Torres, RFG,
Good advice! The whole issue has been in the back of my mind for quite a while and I too looked at and drew comparisons from the hire car scenario. Perhaps a downside to this is that you would probably have to have the aircraft inspected by company staff between each hire.
I know of a couple of incidents where hirers bingled aircraft and walked away refusing to pay the excess. One is now being pursued by the bailiffs after a loss in the small claims court over the matter. The other was a complete tosser and although it was our aircraft, it was X hired through another company. So unfortunately they were left holding the can.