I was talking to one very successful reptile dealer in my area about how he stays afloat the other day and I've concluded there are a few keys to it.
1.) He has 300 mice/rat cages for breeding directly under the shop in the basement that he produces all the feed for the store plus frozen stock.
2.) YOU HAVE TO BE AN IN YOUR FACE SALESMAN, he is extremely in your face, he's kind of wierd but I've seen him sell "just browsing" people on a pair of corns in no time flat, what a freekin salesman. People need that nudge when it comes to reptiles.
3.) Supplies, tanks, etc, you definitely have to have variety of animals and supplies to back it up...
Things I suggest personally:
1.) An internet customer base.
2.) "READY TO GO REPTILE KITS" definitely advertise and make getting introduced to reptiles as easy as possible by offering great deals on "start-up" kits that include substrate, tank, first months frozen feed and animals all for $99.99!!!
3.) LUCK, patience and a lot of hard work, every meal you end up feeding stock you can't get rid of is money lost, it's a tough business but people manage. We have a few local dealers that flounder because they just leave the snakes in a tank on display and never "push" them.
Thats my suggestions if you do do it, tough economy to get into the reptile trade, I'd wait till we're out of the recession or work up a reptile and rodent breeding base before you even think about heading to the bank for a loan. Maybe even have a go at internet shop before a real shop. Who knows
Good luck.