ILR is really the expert on leos here, but I can tell you some basics...

They can live comfortably in a ten gallon tank. I know that they need an under-tank heater, and I *think* the young ones nead a UVB light, so that they can absorb calcium and use it to grow. They stay pretty small (around 6") and they are very gentle. (not to mention gorgeous!)

Their skin is delicate, so you have to be careful when handling them not to drop them. They also drop their tails without hesitating if you grab their tail. It will grow back, but it'll never be as pretty as the original tail.

They eat crickets. I feel the ones in the store 3-4x per week, it should be pretty easy to keep some crickets in a plastic tub or something similar if you don't want to be at the pet store constantly. Ours all get quite perky when you put the crickets in, and they're impressive hunters!

I LOVE leos, even though I've never had one personally. I recommend them for kids, for beginners to reptiles, and I know a LOT of very experienced reptile people who STILL love Leos. Good luck with whatever you decide to get!!