ok, let's say we will go for the basic basic dating site setup -  the core apps + chat module + payments + paid levels module. 

1) Anything else?

2) Is it easy to remove events, discussion boards and timeline? 

3) What kind of use of server resources can I expect from a site with 20-30K members? 

4) how easy is it to move things around? Put navigation at the top, put search by parameters on the home page in the middle etc? 

5) are messages in chat and "asynchronous" messaging to the same person end up together or are they different unrelated modules like in old Facebook? 

6) what happens to layout and functionality customisations once the core is updated? Are they separate like in Wordpress?  

Thank you!