I have told the tenants that they need to only put water down the sink but I can see lots of cooking pans full of grease sitting in and around the sinks when I arrive.  

Worst case scenario is AIRBNB doesn't pan out and then you just get a lease and go with a regular long term rental or sell property and reinvest profit!

Originally posted by @Hui Tin:@Joe VilleneuveYes, so the person who is trying to convince me needs to educate me first and prove otherwise first. 

I'm on an island and there are single walled, tin roof homes that are 40+ years old selling for $350K+ some are going for $500K. 

Or make your life easy and just buy the shower pan.

When we rent apartments we look for tenants who appear to be quiet and while people will say how do you know a quiet he new tenant and tell them we expect 5 things; keep the property safe, clean, quiet, pay the rent on time and don't burn the building down by using small pans with grease in them when cooking.I also tell the new tenants that our tenants work for a living and express that after 9 pm if we can hear your television, radio, or people talking from outside your apartment then you are making too much noise and tenants will complain because they need sleep so they can go to work.

But even despite those things, my turnkeys have panned out well!

They don't always pan out.Continued success!

If this is something more speculative (like the oil shale mentioned above), then it may or may not pan out.

Hi Bill,To the point of taxes, is one able to claim business expenses without a TIN?