From our experience (PA) and that of our colleagues around the country- the general consensus for a modular to be considered "real estate" and not personal property it must :-Be a double wide home minimum-Be permanently affixed to a foundation.

I invest in a wide variety of assets, but my on-market team does mostly residential, including multis, and we do commercial, just not commercial leasing so you can hybridize it.

Columbus OH, we work with a Charlotte land developer here on larger sites like 30 acres and up not sure how big but your niche size is great. we do development, licensed general contractor, and build single family and multifamily we have a few new Floorplans every few months and I travel nationally to be an advocate for our market. it's wide open. high absorption potential and only 8 builders who build over 50 houses a year in our market. 

Unfortunately, a cash-out refinance as an investment industry-wide would not be at 85 LTV. 

Baltimore is certainly an area you need to go in with your eyes wide open and with an agent who knows locals rules and all its idiosyncrasies. 

It’s funny you mentioned this and I have not thought about it.. my wife and I was talking how we could buy land and put a cheap double wide on it (something cheap we can pay in full, $10,000ish) and in our back yard we could slowly start building the dream house we wanted. 

That’s close to the national average now but with a wide spread.

It is an industry wide national standard practice. 

It would be great to hear from a wide variety of folks on what issues they face, processes that slow them down, or any other problems that if they were automated, they would benefit greatly from.More than happy to provide insight into these areas.

You'll reap the benefits in the long term when it's more widely accepted by renters here with the cost of living skyrocketing (it's a little better in Tucson compared to PHX, but still).Best of luck my friend!