Carisma GTB/GT14B

[Oppy]

Could anyone kindly give me some advice.

I run an events company and looking at using the GTB/GT14B PRO Cars for both indoor/outdoor. We use a mix of 1/10th and 1/18th but now want a set scale across the board.

I need these to not go fast lol as generally they get smashed about!

What Batteries, ESC and motor combination is best for these scale cars (without breaking the bank, remember these are used by people who generally cat tell their head from their ass when it comes to RC cars - much like me )

I have looked at the Hobbyking 18th scale Esc and there small brushless motors but I guess I need the ability to turn the ESC down to a mere crawl...

Ive also noticed that batteries also seem a bit of an issue. I cant find anything on the t'interweb showing the dims for the car, servos, esc and for batteries (bloody hate saddle so anything to avoid using those would be ace!)

Long winded and many queries, but any help appreciated