I am going to go and try and look at it tomorrow, peek in the windows, look at the roof. 

no pacific north west investing.and PM companies around here are 8% with 50% lease up if you're in residential space and around 6% flat for multi family oriented PM's 5+ units.AIO is for primary and secondary homes only (not for investment properties).

Let's say it's a roof, and the roof has been on for 20 years and now needs replaced.

First off, they shouldn't have been Replacing a roof if there's a good chance of storms coming through that day! 

I've seen a few clients get screwed when they acquired properties and State Farm had issues with their roofs (the roofs were fine!!). 

Buyers agents may start to get more creative on the payment of their services by offering a la carte pricing, flat fees, and hourly services to better fit their buyers budgets. 

Here in Florida, all the roofs replaced and car windshields have driven up pricing also.The only way it does go down is if we get more providers.

One things are rolling, it takes relatively little to keep that momentum on flat straightaways.Similarly, pulling the pieces of a business together is a similar effort.

What percentage of my rent would you charge or is there a flat fee for each cleaning?

The fact that being too irresponsible to pay for the roof over your own head is considered a protected class, is in itself, an example of the govt being out of control.