I disagree, every 5 days for an adult bp seems a bit much to me. I would be think more 7-10 days myself. The important thing would be to establish a routine. As for size of mouse... I would think a jumbo mouse would be no problem. Maybe a couple smaller mice would work as well. I would ask the breeder what he was feeding, and continue with that for awhile. If that seems insufficient then increase after the routine is established.

As for the vibration... It's possible it could stress your bp. I'd try and keep him as far from the connection room as possible, and not on the floor.