Have you bothered to read any of the thousand of pages on the forum?
I read... but no one answer which coin best to mine, everywhere bad informations + old threads about it.
Go here: whattomine.com . This is the site which you can able to see and calculate regarding on what would be the coin turns out to be profitable on a certain coin. 2 btc would be sufficient on buying gpu even the cost of electricity on your place is somehow expensive but if you do able to buy 5-7 gpu's on that amount then it would be sufficient for mining altcoins.It would really depend on your choice but the coin I would suggest is Monero or Zcash same as being suggested above.These coins are good difficulty isn't too high.