We wanted to do LVP throughout the house and the kitchen and bathrooms had an extra layer of plywood to raise its height so we had to manually crowbar it out, which took days and a lot of work.Aside from the flip, we didn't expect the sellers too keep changing their minds on closing date.

There was crack in the floor tiles that ran through the kitchen floor and into the hallway. 

Well, its likely in there somewhere. 5G is going up and adding equipment which warrants an increase in rent if the lease doesn't permit expansion.

The house is a 3/2 and has an ADU with a kitchen, and bathroom.

If the latter is your issue, you're not equipped and you're going to tap out in whatever market you invest in at the first sign of adversity cause you're weak.

If the kitchen needs an upgrade or the bathrooms, or flooring then you could add value to the house and potentially cash out refinance or get a HELOC based on the new value and use that for more upgrades.

I initially paid out of pocket for most of the interior updates / rehab costs when the family moved in, but now it could use new roof shingles (which we've got estimates on) and some minor updates in the kitchen and garage.

Why not kitchens and dining rooms?   

Upon its effective date, this document hereby releases any mechanic's lien, stop notice, or bond right the undersigned has on the property located at ___________ for the work described above, including all labor, services, equipment, or material furnished on the job.

electrical upgrades , plumbing,kitchen, roofing, shower, sewer,windows, doors, appliances.. plus I add the first 6month on the loan.My concern is that $18k as leftover in the escrow it should go back to the principal and I only  got  $15K the bank said that the rest is towards mortgage payments… ???