I've found that to be a sweet spot, but it's taken time, discipline, and a helluva lot of networking to build the team to do it. 

Partially because you did not rent it for an entire year but mostly because of upfront expenses: getting it ready for rent, buying furniture, electronics, and other furnishings, stocking up on initial supplies, and so on.

I get having airbnbs near lakes, beaches, tourist spots etc.

When I was in my 20s and 30s, it was easy to get a hotel room or rental home, spot on the beach, table at a restaurant, and traffic was a nonevent. 

Permissive ADU laws are a bright spot in CA, since they allow more ways to generate income from a property.

The existing pond should be plenty compared to our 8 acre spot and its pond. 

Inventory is still short, so maybe we just perma-stagnate for a couple years :(I am in the same spot, sitting on cash.

I know trailers are very popular and even considered renting out spots.

Are they efficient at doing the electronic payments from the tenant's account to the landlord's account?

NEW TENANT GIFTSHere's what we give new tenants.....Cleaning Bucket with Cleaning Supplies:white vinegar, baking soda, awesome degreaser, disinfectant wipes, carpet spot cleaner, magic eraser, all purpose cleaner, scrub sponge.Tote Bag with Useful Items and Tools:hand soap, paper towels, plastic garbage bags, toilet paper, toilet plunger, Zip-It (strip for clearing hair clogs from drains), plastic clothes hangers (6), shower curtain liner (good quality cloth one), laundry detergent, dish soap/dish detergent, cutting board, "Freeze the Grease, Save the Drain" kit, “Recycle” bag for collecting materials for recyling, magnet with our name and contact information, picture hangers.Refreshments In the Fridge (for move-in day): several bottles of water, healthy snacks, bottle of sparking cider with a welcome note attached.Larger items: Welcome mat, shoe tray.