Fine - use what ever suits you.Mortgage acceleration is a choice, not a requirement.

They have told me that assuming credit, debt, etc check out fine that I will have enough equity in the land to make the downpayment for the cabin that I want. 

It's fine to make mistakes on the first one as long as you learn from them and don't make them again. 

Look, I have no idea who Eric is, what type of person he is but I will say after a quick search I saw that he did in fact sell his company for MAJOR $$$ and that he is active in Section 8, no idea if his course is good or garbage but still felt the urge to respond because I am so tired of hearing SCAMMER, find it online to EVERY SINGLE post asking about any course. anyone who actually sells their business and nets 110 mil is NOT going to dive into Section 8 or any real estate for that matter other than fine personal residences etc.. they retire and spend it.. so I dont think so.Plus section 8 is simply not complicated its run by the Sec 8 folks in each city.. nothing magical about that.. its a tough way to go being a section 8 landlord lots of drama.

Either of which are fine with me.

You feel you have to rebut my comment to bolster/protect your business that’s fine, but I would suggest you steer clear of exposing client financials unless your in the business of fighting legal suites rather than real estate. 

That's fine as long as all the payments go directly into your SDIRA. 

How many 70+ year old landlords are going to be smacked with a multi million dollar fine for not filing for the last 2 years??

One has paused distributions but seems like it'll be fine in the long run.

Dollar Tree trash cans are absolutely fine!