You can probably get away with the CFL's for veg just fine since you are only using a 150w HPS. You can also use some CFL lighting to accommodate the HPS in the event that you want to increase lumen output. What are you using for reflective material? Those emergency blankets from Wally Mart are miler, but they only cost a few bucks for a pack and 2 packs will cover your cab just fine.
Duck tape is a must have when ever putting together a cab, I have found along with a good screw driver and a good razor. Oh yes, for those doors you will need some weather stripping to light seal the cab.
Well, hope this helps some.
Adieu