Which one of these do you believe is the best alt-coin exchange?

 Just to ask estimate (we are in talks with some guys but the price seems high) .

 If you were to create a website just like cryptsy to exchange alt-coins in between them. No usd or Euro or any regular currency , just altcoins .

 How much would it cost to create one? If a company asks you to make one , how much would you charge them?

 I gave up on bitcoin after I started my new job and shifted my interest in other stuff.

 Last time I was here moneypot started to get big and betterbets.io was becoming huge. I really don't have a clue when was this but I assume sometime before summer?

 Since lets say all of 2015 , what are the major things that I should check and know before going in again?