You also gain access to his Discord group which, to me, is a huge message board that is difficult to keep up with, follow specific conversation, etc... 

If a family member is living in the unit, paying rent on time, and taking good care of the place, maybe it’s worth keeping them happy.

We will have about $1.3M we want to keep liquid so we are ready to purchase when we find the right properties.

But keep in mind that things like closing costs (where you have to close twice - once to buy the flip and once to sell it) may eat up $10k of that profit before you pick up a hammer to repair something.

Lower down payment and keep the current as a rental or sell the current property and larger down payment on the new one?

You should still get a mortgage statement, I don't see anything major you need to track here (missing your entire context please keep this in mind).

I have a rental property behind the University of Central Oklahoma and I am having trouble deciding whether it’s more than I can handle or if I should struggle through and keep the investment.

If a bank is loaning on a personal property- car, motorcycle, rv, mobile home they keep the title until it is paid off. 

Also keep in mind though that if they're offering a rate that much lower than the rest of the market, why hasn't the whole market moved towards that and why wouldn't everyone be using them?

Keep in mind long term stays will significantly reduce your page ranking on Airbnb unless you are actively updating the listing to keep it fresh as it won’t come up in search results since it’s booked.