What are the best interior doors for rowdy tenants?

[Brandt Tingen]

Another super sexy topic I am starting here (jk).  I have to replace quite a few doors at a rental unit I am turning.  About 80% of the interior doors in the unit were broken.  In the previous tenants defense, none of the doors had been updated probably in 10 years.  I just moved this same tenant into a new unit and all the doors were fine upon move-in, now one's already broken at the base.  They were all hollow-core doors.   What's the best interior door for tenants that are likely to break them?  I am not 100% hip to the door game but I am guessing there have got to be better options nowadays.  Maybe a solid piece of foam or insulation sandwiched between two pieces of thin aluminum or PVC/Vinyl?  I am planning on going to the window/door supply house as I finish up this unit but just wanted to see if anyone else had experience with this.  

[Jeff Gates]

How about, replace the tenants?