A hotel room on the Vegas strip...cause you're gonna need somewhere to party with all those bitches after you yield pounds and get rich!
But seriously, if you're in Hydro, and you don't have a pH pen, buy one. You can live without a PPM meter, but you need to know your pH. Also, a door and a REAL extraction fan, like a centrifugal inline fan, will help keep things cool in Flower when you have to enclose that space completely.