@Jaiden Alivera,If being a residential realtor is something you are really interested in, I suggest starting part-time to get a taste of the job.

This is an Assisted Living Residential (ALR). 

Before 1957, there was no industry or investing arena defined as residential real estate investing.  

Is there a DSCR loan available for refinancing self-storage properties in the $700,000 to $1 million range with a reasonable interest rate of 6.5% to 8%, or are DSCR loans only for residential investments?

There isn’t a lot of residential interest.

When he applied for the garage permit he included this statement to the city certifying that the coach house was neither commercial or residential and only used for storage. 

I typically operate within the residential space and have a few rentals.

If done the other way around, the terms of your preapproval will change.With residential financing, you cannot purchase directly into a LLC (unless you look at DSCR) but that still would limit you to the 5% down conventional.  

A mix of commercial and residential topics is fine. 

You'll want to know all those nuances just like the 90 day anti-flipping rule, so you don't waste time when you get a contract.