My business partner owns a roofing company but has weak credit and more limited cash flow.An LLC is a common choice for partnerships since it protects personal assets and simplifies tax management.

I work for a building materials company now and took their online game from Zero to very engaged in the past few years and it's been really fun.

Several factors indicate the company is not that concerned about efficiency or ease of customer process: the website, a process that seemed to focus on one issue at a time instead of all issues at once, and consistently poor communications and lack of common sense from the loan analyst we were assigned.It started off very well with the initial point of contact, Austin Lornson, who did a fine job of explaining the general refinancing process, responding quickly and thoroughly to our questions.

The macroeconomics are on fire here - population growth, job growth, and companies moving and developing here.

A reputable title company will keep things on track. 

Are there other legal or financial consequences I should be aware of?

Fortune 500 headquartered companies always help.You can find a dozen or more markets, primarily in the Mid-South and Rust Belt, that will meet these criteria. 

I have learned a lot over the last ~6 months about furnishing a property, managing/pricing a rental, understanding the ins and outs of Airbnb/Furnished Finder, and analyzing real estate investments generally.My business idea is to use that knowledge and start a company that does the following:-Furnishes properties for investors who want to turn their LTR into a MTR/STR, new homebuyers who want to house hack, or just any investor needing a rental furnished.

It's really all about putting together your team - realtor,  title company, other adivisors, QI.

Well, what would be happening is that your buyer would be buying your house subject to the existing note, since you can't legally sell the property without paying off that note or transferring the debt to the new buyer.