^ Why not open a discussion here so that everyone can give their honest review and calculation.
What estimation do you mean? Financial estimation?
We have a lot of project experts here, you can share with us and we can give our thought.
Yea financial estimation. Like someone who could tell me how much funds are required to build a certain project, so I can go with fund raising with planning. I planned this project with friend, our idea is to first to reach out developers privately and then public announce it. Btw it's not new, but we are adding what we think other project lacks.
I believe this forum has a high-skills developer who can help you to build a project for you. Related to the cost, you can make a deal with every developer and I guess soon, you will be contacted by some of them and offers their help.
Maybe you can explain your project globally, not too details at first, so we can give suggestions or solutions on how much the budget you need to prepare, what is all about your site, your target market, etc. That will help us to determine what you need and calculate the budget.