Space for pets and a large lot, 2 car garage, well built home, we could live in it for a year and rent it out after How did you find this deal and how did you negotiate it?

Contractor is being patient with her and trying to talk as to why she's not opening the door.

If you are cash flowing $200/door and you want to make $20,000/mon then you will need 100 doors.

For your long term success it does not matter as much if you have 10 doors or 100, as if your portfolio value is 500k or 5 million. 

that we’ve learned in our 24 years, managing almost 700 doors across the Metro Detroit area, including almost 100 S8 leases.

If your intent was to hold onto the property and a bear moved in next door (True Story) or maybe you receive an unsolicited offer you couldn't refuse, so you decide to sell.

Initially she was very happy and excited but after a day, she had a disagreement with the contractor and now she's not opening the door for the contractor to come in and finish the work.

This amounts to lost opportunity because if you had purchased RE, at the closing it can start producing return. 5) ADUs detract from the existing structure whether this is privacy, a garage, or just yard space. 6) this is related to number 1, but there are many more buyers looking to purchase homes for their family than there are RE investors looking to purchase small unit count properties.

For example, garage disposals, tenants don't think about what goes down there and how it breaks or mess with your sewer lines.  

Tenants don't read the lease and if they do they forget about the details soon after.Instead, post something like this on the inside of the bathroom door: