I could use the proceeds to to pay down a good portion of my mortgage on my Primary residence (that is currently at 7.3%).

I know SC is steep for non-primary residents.  

@Jennie Berger The RS-3 Zone allows for Single-Family residences & 2-Flats as "Permitted Uses"; however, the RS-3 Zone still requires 2,500 sq.ft. of lot area per unit (i.e. 5,000 sq.ft. for a 2-flat) unless the lot meets the exception for the characteristic of the block as previously mentioned by Nicolas; then it can be reduced to 1,500 sq.ft. per unit in order to construct a 2-flat.

Investment Info:Single-family residence buy & hold investment.

Here's a link to my company's application: https://northstaronline.managebuilding.com/Resident/rental-a...We use Buildium as our software service.

Initially, I was focused on multifamily properties, but after doing more research and considering that I will be making Florida my primary residence, I believe that house hacking or short-term rentals (STR) may be the ideal route for me.i still will own my Southern California home; shift it to secondary.  

We would likely do a cashout refi on our primary residence for rehab costs.

I strongly advise you to get your primary residence taken care of FIRST.

(August 2022)Single-family residence buy & hold investment.Current Value Estimate: $410,000 Purchase price: $345,000 Cash invested: $5,000

Quote from @Brendan M Hornung: I reside in Southern California and started my investment journey in March of last year by purchasing a sub-to single-family home in AL.