Looking for 1/10

You won't have any luck finding an existing model in that scale as it's not a "standard" scale used in the industry. 1/16 and 1/6 are the closest you're going to find unfortunately.

Well that's not good, lol. 1/6 might be real huge for what i need it for.

A std ATX mobo is fairly big, as is the power supply & the cpu runs between 40-70 degrees C. Normally!
A bit warm!
& unless you direct the PSU fan output as a what if hover tank you risk it melting,, if not a fire hazard

If I was doing this, I would Google micro-ATX custom cases.
I remember someone building one of these low power pc's (with laptop style power brick) into a mpc millennium falcon

Alternatively, Google a raspberry PI, an ahem. British pc the size of a cigarette pack!

Good luck

yeah, i did take heat into consideration and decided on a micro atx board, i was looking for a Ferdinand or tiger and i was going to cut the armor in the front where the grill would be and out in a fan with a mesh style metal piece to replace the grill. also had thought about using the actual exhaust  system with a fan in the back to shoot it out the stacks. thought of a push/pull fan set up with water cooling in to boot. the power supply would either be in a custom built stand or external all together. thought about r/c tanks but they are just as equally hard to find in that size.

1/16th scale tank kits, let alone RC ones are fairly expensive, several hundred dollars for the tank kit alone (doesn't include radio).