i know it's 220v in uk. all i can say is be careful.. if you have some carpentry experience all the better. make sure to get some supports in there to, by the sounds of it you're planning big.. what's the dimensions of the room you're planning? ventalation will be an issue also..you can vent it outside, but if you've got 20 plants in there then it's gonna stink for a long way.. and i'm sure it's not that far from your neighbour..

all the best though. make sure you do your homework though.. doo a halfassed job at it and it'll be just that.

Half assed