Well for a pair you should have atleast a 30 gallon long, but heck always remember with these lizards in particular BIGGER IS BETTER. They are super active and love the space.
If you get captive bred which you should, and handle daily they get very friendly (usually) and tame.
Feeding is primarily CRICKETS, but they love mealies and superworms also ( I like supers better less chitin, more digestable,) Also roaches, moths if ya catch safe ones, spiders and love grasshoppers.
Need a nice shallow dish of fresh water. And calcium suppliment to dust their bugs with. I'm sure you do that with your beautiful leopard gecko. Hes really nice looking.
A basking/ heat light of 100 -105 degrees 110 acceptable.
and YES uv light really important these are desert lizards used to SUN, have to have the uv to avoid calcium problems.
Yes I breed, several kinds of lizards,(collareds mainly) my lizards are pets, I do sell most offspring, sometimes a few of them stay too,
Should have kids in the spring.
How many do I have, lets just say MANY, heheheheh all tame and well loved. Thanks for the nice words about my site, 
I think I covered most of your questions, if I missed any catch ya later.
There are many awesome experienced people here that are just pleased as punch (my grandmom used to say that) to help anytime you need it. 
We try and stick together, and share our info, experiences, stories, and critter pics
So feel free to give us a holler anytime.
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Eve / PHEve