Focusing on flight school for now is probably most beneficial for you now and in the future.

Maybe we should do that to all the future tenants.

In the future I will have it spelled out in the contract the lessee agrees to take lien position behind any and all lenders. 

I’m planning on adding square footage and several bathrooms.Once the construction is complete the refinance mortgage will be 88% of the future value of the home.

That way, you can understand if yours is a seller's market and predict fluctuations in order to adjust your timing when listing your property (spoiler alert: we can't really predict the future, but we can certainly identify trends and be more prepared than others);2) Consider potential uses: Depending on the demand in your area, converting a 4-family into a 2-family or single family home before selling might translate into higher and more profitable offers.

3) I highly prefer to leave my brokerages listing agent out of anything in the future, so should I be looking for another commercial agent to work with and be my "mentor"? 

The simplest of these still took an hour.I was delighted to avoid the commute to a title office, and they were happy with their job.I really think its a trend of the future...not at all a scam.

Rent would be paid to the LLC and put into one of the accounts, expenses would be paid out of the LLC account, cash would be kept in the account for future expenses, then the remains would be transferred to my personal bank account.

Other parks in the area are getting $250/month with no amenities so there is definitely some value-add by increasing the rents.Rental demand is very high in my market and I could see rents increasing in the future. 

Perhaps we can work together in the future.