can you recommend a person or company to build real estate web site that operates similar to the top sites that market for buyers and sellers?

Of course and have in the past.. With FB's Open graph search you can laser target buyers and weed out tire kickers.. This is a no brainer :)

Go to city hall. There will be a desk for development...what name it is, well, that will change depend on the municipality. Talk to the staff and tell them what you want, and they'll send you to the right place. You want to talk to engineering and development staff and ask them who the best developers are. They will recommend who you should meet, and maybe even introduce you. When you are changing land use designations like this, it is very helpful to be familiar with city staff. The staff are the people who write the reports that go to council. Council depends on those reports for information to help them decide which way to vote. Ideally, you want a developer who is well known at city call, is used to working with staff, and is appreciated for their attitude. Density bonusing can be achieved in exchange for amenities, and if your developer has a history of making these kinds of horse trades with the city, all the better. What you don't want is a partner who gets the staff's backs up, and doesn't know how to get the best bang for their buck out of the development. Six years of city hall experience and in the construction field on my end.

You're describing the problem, it's setting, and your platform very vaguely. But from general principles, it's best to charge in the least noticeable way possible, so a % of the seller's commission would be the best method. That way it's invisible until a sale comes through, and even then, it occurs automatically as a deduction. If you charge a subscription fee you're requiring the seller to actively pull out their card and send you money, a barrier that's much harder to get them to cross than the less noticeable, passive and automatic deduction from a sale. If you'd like to discuss the issue with respect to the specifics of your particular platform and its market, let me know and we can set up a call, best, Lee

This should help you out: 1. Property Development for Beginners: A Beginners Guide to Property Development by Steve Chandler http://www.amazon.com/gp/product/1482580551/ref=as_li_qf_sp_asin_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=1482580551&linkCode=as2&tag=pittspropedea-20">Property Development for Beginners: A Beginners Guide to Property Development</a><img src="http://ir-na.amazon-adsystem.com/e/ir?t=pittspropedea-20&l=as2&o=1&a=1482580551 2. Real Estate Development: Principles and Process by Mike E. Miles http://www.amazon.com/gp/product/0874209714/ref=as_li_qf_sp_asin_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=0874209714&linkCode=as2&tag=pittspropedea-20">Real Estate Development: Principles and Process</a><img src="http://ir-na.amazon-adsystem.com/e/ir?t=pittspropedea-20&l=as2&o=1&a=0874209714 3. http://www.masterycoachingterence.com/

There are lots of unexpected costs with land development and new construction. Examples include soft costs (arch, engineering, surveying, permit costs, etc) and hard costs (connecting utilities, clearing land, etc). Always have a reasonable buffer to take into account any unexpected costs. Best of luck!