Need to develop a forum

I am looking for something very similar to Delibera’s ideation platform. Check video link below to have a better idea of what we are looking for: [login to view URL] If you have done something like this or are confident of doing this please share 1.) Examples of earlier similar work (if already done) 2.) If not, share ideas on how you propose to do? 3.) How much time and cost? 4.) What will you require from us?