ADVICE on cost & dev't of real-estate (or similar) website

Hi freelancers! I have an idea for a website, but I’m not sure if I will be able to afford to develop the site. I’m posting this ‘project’, hoping to find someone who can: a) advise me on approximate cost range to develop a site like: [login to view URL] or [login to view URL] (but for a totally different purpose); and b) answer some questions that I have in relation to developing and managing a site like this (to help me refine my thinking and determine whether the idea is feasible). I would like to see up to three examples of sites that YOU have developed, that have the same or similar functionality to the two examples above (extensive search function for potentially 2,000 entries; subscriptions or registrations; newsletters; social media links etc). If the site is within my budget, I will post it as a separate project in the next few weeks. I can’t promise to award the development project to the same person (although it is definitely an option!). Thanks for your time. I look forward to hearing from you!