I know the interest rate is higher than a 30-year fixed but it might be advantageous to pay down interest.Thoughts?

What is the advantage of using private money or hard money?

Too many tenants take advantage of Mom and Pop landlords because they are willing just to write it off.

Would this be advantageous at all when compared to a traditional BRRRR and keep it as an investment property?

.#2 More Privacy for Tenants:With single-family homes and ADUs, tenants get the advantage of more privacy and independence compared to multifamily properties where tenants share common spaces.

I was able to take advantage of lower interest rates and home prices. 

In my head I ask myself if we should go for one less capital intensive LTR and give a local STR a try (for the tax advantages) as well. 

They focus on the property’s income rather than your personal income, which can be a significant advantage for investors with multiple properties.I’d be happy to discuss DSCR loans in more detail and answer any questions you might have.

on any RE investment I do in moderate to high appreciation areas, I take advantage of leverage.In your case as presented stocks is easy decision.  

However, I've also seen more than a few doctors get taken advantage of in this biz.