I would also love to hear any recommendations on finding suitable brokerages, effective prospecting strategies, and any other valuable advice you may have.

There is another widely used lease from the Minnesota Multifamily Association, it is a suitable alternative. 

Some take some tweaking over time in areas and team members.  2 another reason is I invest in markets where I like to visit or have families. 

Here are Fannie Mae's requirements for second homes. https://selling-guide.fanniema...Each lender has their own interpretation of those rules, but here are the most commonly agreed upon, which are usually required for only the first year of the loan:Occupied by the owner for some portion of the yearA one-unit home (not a duplex, triplex, or four-plex)Suitable for year-round useOwned solely by the buyerNot rented full-time or operated under a timeshare arrangementNot operated by a property management company that has control over occupancy

Find a good market with regulations suitable to STR, buy right (or arbitrage), stage your property well and be an awesome host and you'll do well.

I think tiny homes are more suitable for a camp.

I'd be interested in something suitable vacation rental; e.g. rustic cabin on a stream.

I'm also interested in going after some boat/rv storage and have been looking into that around STL, but running into issues finding suitable land, and even more issues with planning and zoning.

Then you can decide if this avenue would be suitable for you😊.

Our area receives 12+ million visitors annually so there are plenty of opportunities to capture those that don't have their hearts set on a log cabin.You are correct that the entry cost for condos is less than cabins.