Walking quadriplegic, where to start with bike shopping
I'd like to get my son a bike to ride around the neighborhood (flat), and I am looking for advice on where to start shopping.
His physical specs: He is 19 years old, 6' tall, and fairly fit from regular PT. He's a quadriplegic, but it's incomplete, with greater mobility but less sensitivity on his left side, and reduced mobility and increased sensitivity on his right side. He can walk and run (just doesn't do it the same way the rest of us do, since there is some paralysis throughout). His greatest deficit is his right hand (he can grab things with it, but can't let go...good for braking I guess?)
- an upright position (rods in neck)
- hand brake (can't manage coaster brake at this time)
- feet flat on ground when start and stop
He managed a ride on a normal mountain bike last summer with his physical therapist, but felt out of control and couldn't brake.
Unfortunately, I need to keep the cost down if possible, and I know nothing about building a bike.
Any suggestions what to look at for him?