Even CD's, bank savings accounts, and government bonds have some tiny form of risk. 

I know about a few Brand new projects selling from 45k to 80k  and rent goes from 800 to 1200k US , Great finishes, Real wooden doors, marble floors, granite on bath and kitchen, travertine on bath... ( I suggest cash if purchase cos conventional loans are 11% interest "the lowest") that will kill you . 

Our tiny cabin is located near Alki.

I live in Yuma, AZ, and there's a tiny town across the border (Algodones, in Baja California, MX) that caters to the elderly with medical tourism.

I would make sure it's not over saturated with tiny homes.

But they’re in low income neighborhoods and the houses are tiny boxes that don’t appreciate.  

We hired out the new electrical service, wiring, drain drop,and stove pipe replacement, and did the new kitchenette, floor sanding, new deck, and paint ourselves.The Tiny Tipsy Cabin is currently rented on Airbnb with hundreds of reviews and a 4.8 star rating, and net income is about $3,000 a month before accounting for debt service.

The Tiny Tipsy Cabin is currently rented on Airbnb with hundreds of reviews and a 4.8 star rating, and net income is about $3,000 a month before accounting for debt service.

. * My property is a tiny 2br house that can be rented for $700 to $750. 

A very tiny possibility is that they are just greedy.