You won't have a problem recovering your costs. Just think how much weed you smoke and what its worth for a lifetime of free access to pot. Even when yur an old man you can keep a few flowering buds in the nursing home, just tell them its medicinal. Just get basic equipment like some CFLs and bagseed there's lots of info on how to begin on the forums, its the basic skill of growing a plant indoors thats important to work on.

Peace