The reality is you have to pay for services like this and be prepared to eat the cost if the deal doesn't pan out.

If there are pets in the unit take a pan from under the sink and fill it with water so there's something to drink.

Then interview them.Now, let's look at your issues:1) How did replacing a toilet result in a burst pipe and flood?

It usually works out if you have a great property because people will say "wow this is an amazing property for a killer deal" and youll end up with a glowing first few reviews if it pans out. then you are off to the races

However, as we look back, we see that this didn’t pan out.

All channels can work, but some do pan out more reliably than others over the long haul.You’re prety likely eager to free up that mortgage.. and who could blame you?

Additionally, in Co-Living the property manager walks the property once per month to deliver toilet paper & cleaning supplies (aka property inspection).

Additionally, in Co-Living the property manager walks the property once per month to deliver toilet paper & cleaning supplies (aka property inspection). 

These leads were very unresponsive and may pan out over a longer period of time but the time involved is just not worth the effort.  

If millenial homeowners can't even change their home's air filters, or snake a toilet, or change the oil in their car, that's guaranteed future business for HVAC companies, plumbers, mechanics, and those places all need a place to conduct business in.The commercial mortgage pricing software I use has somewhere around 50 different asset classes in it.