Protection from lawsuits is a big item to consider as well, especially in higher price range properties. 

Due to item 1, adding an ADU can require years to start achieving any return (once the accumulated cash flow recovers the initial negative position).4) Adding an ADU is a slow process.

.* No calls accepted to review receipts: I have asked Jenny several times for the last 3+ weeks to get on a call to review the receipts and all of the items that are in the house, I have given her several deadlines to resolve the issue, she has never accepted any of my invitations to join any calls despite me pleading her to do so as my credit card payment is now due and has a 29.99% interest rate if not paid.I have found several people that were also affected with just 2 facebook posts.

Plumbing, windows, driveway, etc - all big ticket items. 

With that being said, in a worst case scenario, you can always hire a property management company to handle the day to day items if it comes to that. 

When it comes to assessing maintenance costs, one of the best approaches is to request itemized breakdowns for larger repairs.

I would only recommend purchasing items that fall into that vision. 

Review what happened and determine why each item was above or below your expectations so that you can properly plan for next year.Review your prior year goals.Did you buy all of the properties you set out to purchase?

So, in reality every month your moving close and closer to sucking out months/years of profits via items aging out, cap-x coming to bear. 

The good news is that this is the perfect hidden health and safety inspection item with which to negotiate a price reduction.