Quote from @V.G Jason: Quote from @Jay Hinrichs: The mindset of cash flow is everything and appreciation is just luck or gambling or whatever these folks say is one of the worst mindsets I see on BP.

However, if it clogs again within 1-2 months then I believe it would be fair to charge the tenant.

To be fair annually that would be a 3% return. 

Keeping them in the loop could help avoid conflicts or complications down the line.Lastly, think about framing your case around fairness and practical impact.

From my investigation a fair amount of time is spent on developing (private money)   

This is fairly common when people want anonymity.

That's a fairly large single family home.

Weed smoke goes away fairly quickly, unlike cigarettes. 

That seems fairly obvious and you really don't need to use a spreadsheet to prove that.Where I get hung up is your example of paying down a 5% load with a 7% HELOC.

That is a fairly low priority issue for the Detroit police.