@Bill B. It's pretty much city-specific, from what I gather here in TX. Austin, for example has a similar ordinance to Las Vegas and their code enforcement is strong. I have a friend who Airbnb's his house (1 mile from downtown) full time and is crushing it.. but he applied for the license before new rules came in, which essentially grandfathered him in. Like Vegas, new licenses are hard to receive or maintain. But I think my friend is an anomaly.. he's super into it and is willing to sleep in the garage/man-cave while he travels for work rest of time. His location gets him a higher rate from hipsters and corporate types and he's always booked. He showed me his monthly revenue on the Airbnb website and I was impressed.. Actually, I'm gonna ask him to show me again just in case he's messing with me.. Lol.
In my case, I intentionally did Airbnb just outside the Austin city limits 2015-2017 so that I wouldn't have to deal with regulation. It was a tiny house community, so also kind of an anomaly. I think STR's work well for 'destination points' or theme-based venues. So that's what I would do in your South Dakota MN lake cabins. Sell the experience, become a superhost, hire a friend or someone willing to live there and do laundry, tend to guests. It'll start to become more passive after awhile as the routine gets familiar. Get enough reviews to become a 'super host' and get more bookings.
If STR is not a landlord's thing, then they can go back to long term rentals. I like both options. With STR, I like how it reduces deferred maintenance costs since every guest is likely to either complain or praise any bad/good property issues (perceived or real), which helps keep property in tip top shape.
I'll try it out in Vegas too since I'm getting property there. We'll see how the legal climate goes. Maybe the city wants a hostel or tiny house community with full time residents managing the 'hotel' section. But that's a different thread.