IMO those cabs. are to small for a 250W hps. I think you'd be better off building your own with that kind of money.
If I knew how to upload a picture on here I'd show you some of the stuff that I've built over the years.
Belive it or not, but one of the best ways to go about this is on trash day!
Cruise the hood in your car/truck on trash day, and find yourself a good useable peice of furniture that can be reworked.
thats what I've done for my mother chamber.
People will have no clue, as long as your smart about it.
As for the bloom chamber, that was a diffrent story.
I resorted to building my own peice of furniture for that. Not an easy task, but well worth it in the end