(Property manager takes 10%)Rehab would be:45K for new floors, paint, light fixtures, appliances, some plumbing and miscellaneous (one new window, etc) plus new HVAC and ROOF.

I have a slide deck on AI for the STR space if that's of interest to you as well.  

For instance, some rooms in finished basements don’t have full-size egress windows, and therefore aren’t appropriate to rent as a bedroom (without an egress window, a basement room can be a death trap in a fire).

You're using cost of goods (2x4s, doors and windows) to build a product and sell. 

Repair men giving me 4-6 hour windows and told that I needed to remain within the home for the duration of the full repair.

So altogether,  I spent $60k on maintenance on the 3 duplexes,  that includes appliances, windows, and even a roof replacement.

Remodeled a house before that had several animals as pets in the house (dogs and cats both) the animals were not let outside to use the bathroom (from what it looked like ever) we sanded down the hardwood filled a pump up sprayer with the odorxit (super contracted stuff mix as stated in bottle) sprayed all of the floors till they were soaked with it then opened the windows to let it all air dry.

People who tell you that you don't need a mentor or you don't need to pay for a coach, "everything is available for free", are the ones who spent a couple of years "slip sliding" through the process, lost a lot of money and wasted a lot of time. 

Do you charge for small cleaning items, like windows weren't cleaned, oven needed a quick cleaning and kitchen cabinets needed wiped out?  

Windows, homes of the 1900s will have single pane windows with wood sashes often times these are in disrepair due to abuse and neglect over the years.