But what if you purchase with alternate financing (sub to, assumable (look at VA but requires OO), owner financing, etc) and only did buy, rehab, rent, and repeat (one less R - more precisely not a refi but maybe use 2nd or heloc)?

Unless a guest smokes regularly or heavily, our ventilation and air filtration is such that our cleaners have not yet alerted us to undeniable smoking, etc.Would love to hear what others use and their experiences with Minut as well (since in part, I went with Minut based on what I read here about the other alternative- NoiseAware).

The two most common alternatives that our clients will use are1.

Better than the alternative of having a line of credit at 12%, the 2-3% hit in spread is lower than a 5% increase in cost of capital in my opinion.

Any better alternatives?

This one just told me it can't be done and didn't offer any alternatives.

Condo Heloc could be difficult with recently being listed for sale..check in with @Joseph Chiofalo he's a South FLA based lender and they have DSCR and alternative income bank statement second position programs..they also do mixed use and 5+ units commercial lending. 

Depending on if you use a DACR loan or other alternative financing the LLC might be required.

From maintaining Winter and Summer temperatures to deposit alternatives, etc.

., you may consider conditionally approving with a higher security deposit (or alternatively, use an insurance policy - "fee in lieu of deposit"), first and last month's rent.