You might move to a city with a lot of commercial real estate that proceeds to get hollowed out.

But after the ridiculous answers I received I said Frog this!

Bathrooms , minimum $ 5000 each , Paint ceiling white , grey walls white doors and trim $ 8 to 10 grand . lets say 10 doors to change , hollow core $300 a door labor and materials  Light fixtures and outlets about $1000  Kitchen $15K on the cheap side and go up from there , Remove carpet and refinish floors around $6000 .

There's a 3d printed bridge in existence where every structural piece was printed with hollow support structure and companies working on small printed houses that look like cool little adobe huts.

The most damage caused by a tenant we've had so far has been by a non college student, and even at that not too severe- the dude cracked a toilet seat, broke off the shower head, and damaged the hollow core closet door beyond repair- nothing too serious.  

They were all hollow-core doors.  

Well, now there own client base is hollowing out there reoccurring rev base.

With doors I need to replace, I have gone cheaper with hollow core doors.

Lowes or Home Depot hollow center prehung doors are $150 new.

WHO the FROG talks that way!?