Is it a duplex?

If a duplex / multi-family home, how do we assess/calculate potential rental value?  

If they want to use it as a bedroom, they can do so even with the open wall.

We also had to replace two rotten walls and some rotten floor joist and subfloor.

., "I will buy at least one single-family home, duplex, triplex, or fourplex before the end of 2019") and then do it.

I recommend buying a duplex in a good location.

here is the situation. i left a really good paying job to take care of my 81 year old parents because my dad is chronically ill and my mom is almost there. i wont go into too much detail, but my sis doesnt help them. ill leave it at that. we have a person who comes twice a week to help with cleaning and other household tasks. i carry the bulk of the weight cooking their meals, running errands, grocery shopping, picking up meds, and taking them to dr appointments. its a full time job. i get a small salary of $1000 a month from a care giver sub contractor for the VA. ive been paying my bills with what savings ive had, but only have a few months of funds left. i own a duplex. i have over 200k in equity. i live in texas and texas has weird laws about refi and heloc/heloans when the property is 4 units or less and owner occupied. i would rather not sell, but if thats my only option i will have to at some point.does anyone have any advice or possibly be able to point me to lenders who might be able to work with my situation?

The other day they rehung a cabinet upside down and with drywall that was one inch back from the rest of the wall.

Also, per the images, a crack develops in the kitchen, on the other side of the house where the wall meets the ceiling. 

Dark stain with contrasting white walls could look nice but so does the light bright and airy look.