Some kitchens will be 5k if its a small one and some will be 15k if you are taking out a wall and its larger.

It had some good architectural features that people loved, and the original plaster walls downstairs were in great condition, not even cracked.

I don't think you need to take a picture of each wall, but of each room and each noteworthy item that was damaged is really helpful. 

For instance, one property seems to have an extra bathroom that is not listed in the county records.I plan to make some modifications, including removing a closet wall to expand a bathroom and taking out a kitchen island that contains electrical outlets and a switch.

The build cost would be a little higher because i would use foam in the exterior walls and also use insulation in the interior walls for energy saving and sound dampining.

But, that $50,000 investment will pay back $75,000 (beats wall street).

Paint walls, make sure everything is in great condition.  

Painting walls, updating fixtures, or handling minor repairs yourself can save thousands upfront.Consider Your Exit Strategy: You’ve got the right idea;house hack for 1-2 years, then convert the property into a long-term rental.

Replaced both toilets with brand new ones, replaced the 2 car- garage door with a brand new one, had all the walls freshly painted, put brand new baseboards in, and had the kitchen cabinets painted as well.

Once again, that is the myth that started from Wall street trying to sell their portfolio.