How much is customizable in a WordPress multi site with custom domains?

Take the # of hours it takes you to do it and charge $50/hour. That's the price. Eventually you can charge $100/hour but that will require a bigger customer. If the customer is small < $1M in gross sales per year - charge $50/hour If the customer id medium < $1-5M / sales - charge $75 Over $5M - charge $100 The challenge you'll face is clearly defining the expectations and handoff so that you're not stuck doing stuff that you can charge for and always getting interrupted from past customers.

Dilip was very kind in his response. My answer might be a bit on the "tough love" side. But that's for you to decide. My intention, just for the record, is to help you (and those like you) on your path to success. And that starts with having a viable philosophy about entrepreneurial-ism and business. And I'm going to answer this because I get asked some form / version of this question very frequently from newcomers to entrepreneurial-ism. The scenario goes something like this: "I have a great idea. It's amazing, I love it, and I just KNOW it's gonna make me a ton of money. But I have no money right now so I can't afford to (fill in the blank with things like "to build it / create it / market it / etc" or "to hire the required staff needed to work in my business to sell it / develop it / etc"). And I don't want to tell anyone about my great idea because I'm worried someone will steal it and make MY million / billion dollars. But I can't afford to legally protect it either... So how do I launch without the skills to personally create the product AND no money to hire anyone else to do that either??" The answer is ... You don't. Look - let's be honest. All you have is an idea. Big deal. Really. I'm not saying it's not a good idea. I'm not saying that if properly executed it couldn't make you a million / billion dollars... But an idea is NOT a business. Nor is it an asset. Until you do some (very important) initial work - like creating a business model, doing customer development, creating a MVP, etc - all you really have is a dream. Right now your choices are: 1. Find someone with the skills or the money to develop your idea and sell them on WHY they should invest in you. And yes, this will mean giving up either a portion of the "ownership" or of future income or equity. And the more risk they have to take - the more equity they will want (and quite frankly be entitled to). 2. Learn how to code and build it yourself. MANY entrepreneurs without financial resources are still resourceful. They develop the skills needed to create what they don't have the money to pay someone else to do. 3. Get some cash so you can pay someone to do the coding. You'll probably have to have some knowledge of coding to direct the architecture of your idea. So you will likely still have to become knowledgeable even if its not you personally doing the coding. (This is not meant to be a comprehensive list of options... And I'm sure some of the other experts here on Clarity have others to add - and I hope they do) To wrap up - Here's my final tip to you that I hope you "get"... It's FAR more valuable to have an idea that a very specific hungry crowd is clamoring for right now - One that THEY would love and pay you for right now - Maybe even one they'd pre-order because they just have to have it - Versus YOU being in love with your own idea. [Notice I didn't say "an idea that some as-of-yet-undetermined market would probably love"] I wish you the best of luck moving forward.

Yes. https://docs.woothemes.com/document/configuring-woocommerce-settings/

Well first off I wouldn't recommend trying to power your client's database with the standard WordPress database instance. They can use WordPress for the website all they like. But with millions of records like that, you really don't want to move those data in with WordPress. For that matter, you're probably gonna want a dedicated database server to answer those questions, if the client doesn't already have one. You might also need to investigate something like Elastic Search, depending on what your search requirements are and what sort of database they are using (pay close attention to whether or not it provides full text search ability). Beyond that, and somewhat obviously, you're also gonna want SSL on the website and to make sure you're up to date on federal and state privacy requirements for data like this, as well as best practices for securely transferring data over the web (port configuration, ssh keys, etc). The privacy concerns would raise a flag for me. If those data have anything personally identifiable in them - which they very probably do - then you're really gonna want to make sure you do your research on security of personally identifiable information. Government specific privacy /security /auditability requirements may also apply, so double check that too.

If I was just starting out, I'd consider learning Meteor (https://www.meteor.com/). It's just entered version 1.0 and after working with it for a little less than a year I do have some issues with it but it still makes for a very solid framework that gets you up and running very fast. You would only need to learn Javascript, and you can slowly work your way towards nodejs from there (which Meteor is based on) if you want to, or you could get the basics down and focus on learning design if you prefer.