You want a 200lbs trail bike to run hiway speeds or a 400lbs road bike to handle trails....not gonna happen.
You need to offer more info for the inmates to help you.
Number of years of riding and type.
The area your looking to ride, the terrain type, single track, jeep roads etc.
Physical condition, age etc.
Don't get hung up on seat height or HP ratings, you need to hang out with local inmates and throw a leg over a few different rides.