The Airbnb portion (which is a bed and bath on our first floor with a private entrance) has rented enough to basically help pay our mortgage and housing costs (utilities, small repairs) so we've set aside a large portion of our W2 salaries during this time.

I currently own a "condo" in Kentucky which is part of a building with 4 units, each with separate entrances and back patios.

I'm thinking about turning an SFH into a duplex, there is a separate entrance and it seems easy to do it. do you recommend it?

Purchase price: $92,000 Cash invested: $36,0003/3, built in 1983, in one half of a duplex, just 1 minute from an entrance to Fort Bragg.Purchased with a partner providing the down payment and myself providing renovation costs and labor, with plans to refinance within 1-2 years of purchase to successfully complete this BRRRR deal.Roof, fence, and HVAC all less than 5 years old at time of purchase.Largest renovations included new deck, LVP flooring, granite countertops, and finishing the master closet.What made you interested in investing in this type of deal?

Also, as he indirectly pointed out, you need to also figure out your "entrance' strategy.Your OP didn't mention how you were structuring the deal. 

We also upgraded the flooring, expanded the bedroom by shifting the bedroom entrance and upgraded the closet too.

If you have cameras or any kind of recording device, it should be fully disclosed.If you're using cameras on a long-term rental even when it's occupied, you're probably investing in the wrong neighborhood.Even for short-term, you shouldn't have more than a camera in the front and back to watch the entrance for security purposes or to record check-in and check-out.

Markets that appreciate a lot have their appeal but often don't allow a new investor with limited funds to enter.I see it as a service to my mentoring clients to allow them and show that that entrance well before thy can afford the down payments in the strongly appreciating markets along the coasts.

That will be up to you to decide if you want to do value add (potentially grabbing more equity in the deal) or just doing something turnkey to simplify your entrance to a new market. 

Or even a basement if it has a separate entrance.