Or you can invest in a more cash flow based market like Oklahoma and not see great returns on equity.

I suggest you contact a realtor or someone with access to MLS and run comps on properties similar to your mom's in the immediate neighborhood, which have sold in the last 3-6 months to get a more accurate marketable value. 

I was curious if it makes sense to, while it needs to be replaced anyway, change the window opening so it is a more "standard" window size. pros: cheaper to replace in future, cheaper window, more money going to my handyman rather than towards the price of the windowcons: unnecessary extra work I know this may be a silly question but I am curious of other thoughtsThanks!

Should I partner with someone who is in a more stable location?

By the time you go through the AMMR process (and pay for it) and the cost of a more expensive product am sure it will pretty close to a wash at the end (probably a savings) to go put the GWB on the outside. 

I have a more technical question regarding the BRRRR, and I guess all other, calculators.

Also, I would say develop a more specific set of goals to see what the best strategy is for you. 

But, I can see how travelers will prefer a more private experience in the future.We are definitely open to purchasing a private SFH if we can make the numbers work.

I noticed there are several bilevels like this in the general area.2) There's a home down the road that sold a few months back after being flipped, but it has a more traditional layout.

Also, reading the product reviews will provide insights into the pros and cons of the app so you can make a more informed decision.