@Will Long prolly gonna wall away because it’s a full rehab

Ground floor/basement portion floor has a noticeable dip in the floor and wall.

Some of our 1 BRs have the kitchen just against one wall, the bathroom is a shower only with small (<25") vanity.

@Mason Bear I think trying to sand and mud over the interior walls would be a short term solution, as the floor is pulling apart in the same area.

Unsure of existence of asbestos wiring, lead paint - the interior seems to be plaster walls with hardwood floors.

If you fail to act, stop learning since you are wasting your time. 

There is a bunch of waste space on the side of the lot that would be perfect for a new property.

Surely you've got 3 or 4 of these things hanging on your wall at least!

One of the things I caution is, I know rehab from what I can see, and often there is things that come up (behind the walls, during inspection, etc), so make sure you budget for that. 

The previous tenants had a dog and a cat in the house, but upon their vacating the premises, the home was thoroughly cleaned by myself and then a cleaning service, most walls were repainted, wood floors were re-sealed with polyurethane, vents were vacuumed and furnace filter was changed.