One of the above houses was a foreclosure, now bank owned and on the MLS. 

Lots of restrictions and tight underwriting on these.

Any transactions you will do as a realtor you will be doing them on BEHALF of your broker not you as the realtor. 

The “hot tub show” models will work, but you will do more work on them in the end.  

She then contacted all RV parks owners that had their parks listed for 9 months or more and had not sold, offering to purchase their parks for a certain amount and disclosing her intent to “flip” the contract.

I think she is equally responsible if she is 50 / 50 ownership per the offering and through thier own discussions on podcasts, social etc. 

Especially paying MN taxes on NV tax free properties.

Getting a lower rate will also depend on the amount you're putting down.

The price was lower than anyone else offered.

I'd check local STR FB groups and see if you have a local Real Estate Club.You can offer your services there, maybe for free in exchange for the experience.