I chose to do it slightly differently to avoid a Heloc or 2nd mortgage encumbrance, so far I've paid zero interest and my numbers are going to be triple what your parents expect to spend.I have a credit forum if you or your parents would like to dig deeper but the basic brush strokes are these.1.

I recommend using a "truck brush" to apply the solutions and a pump sprayer to rinse.I'm not trying to be a "downer" here, but years of cigarette smoke can be as bad has having an actual fire in a home.

You never have to pick up a hammer or a paint brush, or even know someone that can.

Too many landlords just brush off their behavior under the claim, "it is just business and the lease says I am not responsible".

@Patrick Philip That's an awfully broad brush your gurus are painting with.  

To the casual observer who focuses on other asset classes some read a story, see a few struggling properties, and paint broad brush strokes.

.- brushed Nickel & oil rubbed Bronze hardware work fine together.

Many others are the outside looking in and read some news stories and have maybe one experience with it and paint broad brush strokes as to what is happening in the space.Industrial the newer buildings with higher ceilings for warehouse and distribution are more in demand from larger companies.

@Daniel Peavey Be sure to brush up on your state's eviction laws as many states have changed their laws during COVID-19. 

I brushed off the idea because I was uncomfortable dealing with the elderly.