The structure is mainly appreciation-based, which minimizes tenant and maintenance risk. 

Timing your next investment is all about balancing risk and financial comfort—trust your instincts and run the numbers carefully.

However, it is a potential nightmare for your parents since they are taking a risk. 

Have you ever done this or been involved in this?  

Generally speaking, I think tech like this stuff and social media have lowered the barrier to entry, allowing people to take risks they dont fully understand, whether wholesaling. flipping, lending, etc.

The risk of property damage or a lawsuit from a dog bite is too high. 

@Jordan Meltzer unless you find a screaming deal - a Class A property won't cashflow for 3-5 years.Class B: 1-3 years.Class C: most investors don't properly understand the risks, so should stay away from them.So, you may need to deal with negative cashflow, but plan on appreciation increasing your wealth.

Those can still return 4-5% on your money and is without really any upkeep or risk. 

I've heard that about the algorithm and changing your listings but didn't know about getting so closely involved with Airbnb + VRBO.

I think it speaks volumes regarding your care to the situation the heir is involved in.