That higher loan amount means your payment is higher.  

I acquired this property with a 20% down payment and an 80% seller financing note with a 2-year balloon to allow myself enough time to stabilize it and get longer-term commercial debt on it.Over the last 7 months, I was able to raise the other 4 units to market rent and lease out the larger 5th unit to another state government agency on a multiyear lease.

That is having no idea of your down payment ability, ability for a loan, or experience.

How are people making a "business" of investing using this method at this time?

Still all  in of about 100-120k assuming you split the down payments with subway on 2 facilities.

There is an acceleration clause is most deed of trusts, that is, his mortgage document that calls for a full payment of a mortgage if the title is transferred in this manner, but people do it all the time and accept that is the mortgagee/lender ever exercises this clause then you'll just have to refinance the property and since you were paying the mortgage and have proof, you should have no difficulty in refinancing the property. 

Let me define (big picture high level) - numbers for illustration only they neglect closing costs of sale and pref payment paid investors during the hold).Your share of the GP is calculated on what you do and what you bring in terms of capital.

It depends on whether you are using current investing methods that include a bank or if you are using creative financing.Here is the difference.

How much CASH do you have for a remodel and/or down payment?

House hacking is an awesome way to leverage a low down payment to build your multifamily portfolio.