Is this B2B idea viable?

I think you need to think outside the box. You can definitely make 50k a month but someone just giving you ideas is not going to help you. Remember Ideas are just 1% execution is 99%. Find something you're passionate about. Find a problem that people have daily that can be solved. But if you wan't ideas: E-Commerce is going to be really big over the net few years. Helping people increase their conversion rate will definitely make you over 50k a year if you can execute it right.

As your targets are SME companies with 3 or more developers you can use LinkedIn premium search for finding the list of top executives of the companies and send them in-mails for partnership! Another great source for you could be outsourcing websites where US development companies are represented and do testing for their clients periodically for various projects! Please call for more detailed information of the best B2B sources for you! I have got also some availability to the actual lead generation job for you with a reasonable hourly rate. I have been working as a sales manager in this industry for over 4 years and have got large databases of B2B clients that you will be interested in!

I wrote an answer to a similar question today which you can find here: https://clarity.fm/a/2877 The one flaw to your current process is this premise: "Whereas, if I focused on a good idea the whole process of driving success would be easier." This - from my experience - is simply not the case. I'm working on what I believe to be the best idea I've ever had and it has been absolutely the most challenging time I've ever had in a career full of product challenges. So a "good idea" does not make the process any easier. As I privately advised the person who asked the other similar question: I'd encourage you to define all your own pain points in your life and filter by most pain and also least addressed by existing solutions. Building what you know and what you're excited about building is the best that any of us can hope for. There's no path to greatness that isn't full of challenges ahead. Happy to do a call to discuss further.

There are a lot of places where you can try to get validation for your idea. But before you start going to look for these places, get your Buyer Personas (the representation of your ideal customers) in order. If you know who your ideal customers are, then the next step (of finding where they hang out) is easy. You can easily start tapping into your (existing) social network, for example to try to find people to have a conversation with and try to find out if they're really having the problem you're solving. Another place is local meetups, check out sites like meetup.com and see if they're meetup's in your area around the problem you're trying to solve. Go there and start talking to people! Online, online there's million of possibilities to try to find your ideal customers and trying to get a conversation with them, use Twitter search, certain Facebook groups around your demographic, newsletters, things like Quora etc. to find people hanging around and trying to get solutions to the problem you want to fix. (there's a ton of online locations in this SlideShare deck if you need more inspiration: http://www.slideshare.net/jcvangent/doing-customer-development-and-stop-wasting-your-time-startupbus-edition) Don't feel limited by the amount of budget you have, for having conversations with people you don't need a budget, you just need to know where to look to find the correct people to talk to. I recently wrote a blogpost around the subject as well, to give you some tips on how to reach the right people and what to ask them if you want to dig a bit further in the subject: http://inboundrocket.co/blog/stop-wasting-time-how-to-prove-youre-building-the-right-product/. Best of luck!

There are a few online B2B marketplaces in the US to consider and which one you go with will depend on your requirements. Amazon Business: This is a very legitimate option now as Amazon looks to expand its offering away from just a B2C model, with a greater focus on B2B. You can offer unique discounts for businesses and a host of other features to drive your B2B business. ThomasNet: This is more for a traditional supplier/purchaser business relationship but may be a worthwhile avenue if you sell high volume or recurring use items Alibaba and eWorldTrade: Both Chinese based business so I am unsure of any implications on trading here from the US however there are a huge number of US businesses looking to buy on here and so they are atill some of the largest B2B platforms.