Mystery: Why Entry Door Handle / Deadbolt Sets Break on Rentals

[Jon S.]

Why do entry door handle sets break down on rentals? Its a mystery! The thumb latch seems to wear out and gets too loose on the sets I have been installing, and they are name brand sets. On my residence it never breaks! In the last year I've had to replace 25% of them. Any brand & style suggestions for a more durable set, which must incl deadbolt too? I mainly shop at Home Depot, but I could buy elsewhere if it will be better quality. 

[Dan H.]

I have started only proving the deadbolt as the locking mechanism.  Doorknob does not lock.  Deadbolt locks.

Here is some rationale: Harder for tenant to lock themselves out.  Deadbolt is more secure than the locking doorknob. Doorknob without cylinder has less things to break.  Deadbolts seems to be hardy and seem to not break. Doorknob without cylinder is a bit cheaper (it is not done primary for the bit of cost savings - it is done for the other reasons).