[Kidman(DS)]

If so.. What tanks they use there and how much are they around?

[Torch]

You mean for rentals or what?

The rental ions come with a aluminum 47/3000 (47 cubic inches, filled up to 3000psi) tank with a smart parts regulator. I think its a maxflo micro reg but I didn't feel like studying it closely.

I imagine the shockers and nerve have the same tank, but I've never seen someone rent one so I don't know.

Probably $120 or less, mostly due to the regulator.
A tank of the same size from another company may be less and for all normal purposes work just as good.

Naturally a larger tank will hold more air, but be bigger. If you do buy a bigger tank, look at carbon or fiberglass wrapped tanks because they will be lighter despite the bigger size.

Its worth mentioning that if the field has all-day air, which this one does, then tank size doesn't matter as much as long as you can get through a game. That isn't a problem for most people, unless you're out there shooting most of a case per game.