How do we minimize taxes on the profit we're making on this first home? 

I want to profit off the interest rate and perhaps offer 6% rate on what is left on the mortgage.

What strategy are you currently interested in pursuing?

Often don't have to be licensed, but ask.If you are serious about all this, recommend getting your RE license AND pursuing NARPM courses.

Year over year we've seen impressive appreciation rates and often times investors are able to re-sell at a profit a year later with minimal to no work.

If anyone does this, theyre likely doing it as a favor and not a for-profit venture. 

I do have an LLC with good credit, so I’m wondering:Would it be worth pursuing a business loan to save on HML interest rates and fees?

I am sure it will all work out for you in the long run.. we sold ours and made a tiny profit on each but its better than a loss right ?

If you decide to pursue this option be sure to EXPLICITLY spell out how the maintenance of the buildings will be handled as these types of facilities tend to be hard on property from my experience.

This means it can be very profitable if you buy at the right time, but can be brutal if you buy at a peak.