And yes i keep rotating but...  

But, the strains of affordability and what to do about it could get ugly (e.g. ban strata rentals vs. force them open; go after illegal suites or turn a blind eye;  ban AirBnB or tax, etc.).

You can change out lock cylinders and just have a few extra and rotate among properties.

It could also save a tenant a lot if they're paying and not put a strain on the rent they need to pay you.

If it goes through, you have rot at minimum or termites.

However, that's a headache and can put a big strain on a the tenant (assuming it was legitimately lost).

. - digital deadbolts (schlage), one landlord code for all, one contractor code (rotating annual) for all.

I do know if you bought the property for 14K, that could be used as a comparable sale and hurt your chances of pumping up the value.I don't care what you put into the property;  new windows, doors, floors, roof, HVAC, kitchens and baths, paint, plumbing, updated electric and a rotating hot tub on the roof, you will not get a portfolio lender to say the property you bought for 14K is now worth 127K in that short of a span (or they won't be portfolio lenders for long). 

Doing business with family can strain the relationship in my experience and don't always follow through. 

In four years at my first duty station I was TDY for a 90 day training mission, two 28 day CTC rotations and I was deployed for six months.