These include accidents (I recently had 2 units destroyed by fire), natural disasters (I have had two units each hit by 2 hurricanes), property management turn over (they sell or stop being as good, I have experienced both), or turn over of team (I am turning over at handyman and I suspect plumber), or just wear n tear of property (slab leak in poor location, sewer pipes rotted out (one unit this month), roof, foundation issue, etc.).  

In my area you have to strip the roof shingles at a minimum . 

A roof on the 600K property will cost more than on the 300K property, but you have more roofs to repair on the multiple 300K properties.

Pro tip--make sure your exhaust fan in the bathroom is vented to the atmosphere--meaning out to the outside.....go out the roof or out the side of the unit or secured to an opening in a soffit vent grille off the house. 

Large basement and attic space, new roof and some of the kitchen is already torn out from the current owner. one bedroom does have a closet that will need built. plumbing seems fine, maybe a couple angle stops to change.

Other items, such as football equipment from the kids’ league, were destroyed in the flooding, he said.More leaks have come from the plumbing between his first and second floors, prompting him to leave his light fixtures hanging unmounted from their wires so they don’t fill with water, he said.Clusters of dead insects cling to one section of his ceiling.

Property was sitting on market and needed light updates (roof, flooring, paint) but was in a great area that allows STRs giving me multiple options when deciding on rental strategy How did you find this deal and how did you negotiate it?

You have the mortgage, taxes, insurance, maintenance, capital expenditures (roof, flooring, etc.), and also need to consider the cost of vacancies or bad tenants.I also recommend you charge market rate, for yourself and the tenant.

And if all houses have not been fully rehabbed (we do fulls on every buy), some expected number for capital expenses should be included in that (IE if you have 3 years left on your roof you need to be deducting $X from that figure, repeat ad nauseum for all major capex).

i don't recommend buying a random property in a random midwest state for $118K that looks great but actually needs a new furnace, a new roof and a new sewer line, and will crush you with capex and make you sad.hope that helps.