Of course "hoping" rates will come down is not a sound strategy so finding a way to assume a loan that already took advantage of low rates is a great option.If you were starting over and targeted a large SFH, would you try to maintain the property in a way that would still attract regular homebuyers (not investors) if you needed to sell?

As Jay pointed out all this reads of what I'd call "par for the course" in D/C class.

There are some great on-line real estate courses, and I have found the information within them has really been helpful for my investment business.

As other colleagues have said, of course you can refi into one.

And of course, these would be hard to answer in a public forum.  

Of course it will be much harder to find someone who wants to pay for it as a business as they will need a loan and appraisers will probably lean towards a real estate valuation

Do know of any resources (books, courses, YouTube videos, etc.) to get educated on private money lending?

If that is the case then their loan would not go against the property and you keep the land loan. of course then you need to come out of pocket for site prep.

If you want to explore MF or any other asset class, the best course is to go to some training courses and get a coach or mentor. 

Of course, with any public figure involvement, there may be some negative feedback with that person, but from my experience, the SDIRA Wealth building team in general is definitely worth considering.