First Post (long) but need advice

Hey everyone, I've had some good luck growing outdoors due to the fact I have an almost perfect southern exposure in a stealth spot as you can see from these photos from last year. However, I've never grown indoors. This year a disabled vet asked me to help him out and he gave me 5 seedlings that ended up being 2 female Great White x #1 Skunk and 1 female Northern lights x with something I forget - Doh. They are all doing great with the NL going to be an early harvest and the others sometime in October. Since these plants have superior genetics I decided to try and clone them so I could perpetuate the lines. After many failures (see I told you I was a newb) I think I finally have one NL and 3 GW x S. Another friend also gave me two 400 W MH/HPS systems as pay back for past generosities. I never sell, I share. I thought I had a great cabinet ready to convert but after researching the indoor scene it is way too small for even one light at 2x2x4 feet. I own my own house but my wife is a pack rat and all our closets are filled to overflowing plus I had to beg to scrounge enough room in the basement for drying the outdoor crop. Long story short, what can you recommend I do that will let me rig up at least one light for veg growth quickly and easily. I'd love one set up for veg and one for budding. I made the mistake of thinking I had the right cabinet in hand so I waited too long to do my homework and now all my females have flowered so I know the 4 clones I have now are my last chance. I can build my own but am open to cheap alternatives I can buy. Any and all suggestions, designs and derisive comments are welcome. I need help friends so I can help others friends that truly deserve it. Thanks in advance. I also posted this in the Newbie forum.

First of all those plants outdoors are unbelievable. kick ass. Second with Hps lighting they radiate alot of heat so it will have to be a fairly big area. If it has to be a small area I would use cfl lighting. I guess I would build a grow box or an old dresser of some sort. I would really think about the heat issue with those lights also your power bill!!!! However Hps is definetly the way to go!!!!