Although the majority of Michael's superb content on Cost Seg focuses on how to properly assess the value of Cost Seg, he also does highlight some items regarding the internal workings of a Cost Seg study.

Also, you get notified if they cancel the insurance.1) Because it is a requirement  In other words, you cannot rent this unit if you don't have insurance.2) As a landlord, our insurance does not cover your items. 

Avoid putting certain items in the property like disposals, dishwashers, and mini blinds.

It was totally weird he had one room full of religious items and one room full of tapes toys and magazines.

The main items that need to be specifically outlined are your expected time on market for the property and the minimum amount that you're willing to accept for rent.

Do those two items above 100% dictate needing a total gut or can a home be sold with the panel and the pipes how they are and can it be financed?

A recommendation or opt in is preferred but obviously they’ll capture more people with the automatic enroll. 

I know there are the obvious PITIA items but what about property management fees (I plan on using a property manager), maintenance/repair allowance, and vacancy allowance?

Credit scores are tricky because there could be items like medical debt or student loan debt that weighs the score down. 

They may be living there but as long as the rent is paid, the house is taken care and the lease is followed, I don't worry about it.To answer a few other items that came up - some of my rents are higher than market, some are even with market and a couple are lower.