Primarily I'm looking to get into fix and flips then move into long term rentals.

I am a small real estate investor in San Antonio, TX looking to diversify my portfolio with some long-term units in Ohio.

Is everyone on the same page with the long-term goal?

If rates fall, you can refinance the 2nd without touching the 1st lien.I wouldn't plan for long-term financing with the Heloc as the draw period will term out at some point.

Another option is to pay the loan on a 15 year term.

We have a single-family long-term rental in Port Charlotte that we'd like to keep the current mortgage rate, but we do have some equity we'd like to have access to. 

Just out of curiousity why would someone choose this model over a short term rental that is isolated by itself (privacy) or a hotel? 

She was 2 weeks late this month, she was transparent as to what was going on so I gave her the benefit of the doubt. 

I've included a preliminary floorplan below.My goal with this ADU is flexibility in terms of renting it out either short-, medium- or long-term rental in the future for income, as well as maximizing resale value (main property is 1300 sq ft 3/2) to someone probably with an investor mindset who would want to house hack.My main concern is whether it's a good idea to have 3 en-suites at the expense of having a small living room/kitchen area.

In this case, you might want to mix it up and be partially a mid-term and short-term rental.