They could have chosen a different number, but one month makes sense because short-term renters tend to stay for days or weeks, not months. 

There are no interior pictures on the listing - none and no viewings.Price of property is pretty interesting though. ( I am not a fan of gambling )How i can see inside of property ?

Exact color varies based on flooring we have chosen or if we are keeping existing flooring and color of kitchen cabinets.

Im in this space and in no why would I ever gamble my mothers resources she will need on one of the most volatile, high risk aspects with a very high failure rate.

Gambling is short-term speculative play; that's flipping,  that's Vegas slots, sports betting.

I used to own three rentals in Seattle but after 2012 when the prices got too high I realized that sophisticated buy-and-hold investors invest where the numbers make sense with cash flow, not appreciation (gambling).

But knowing what you are doing should be a part of investing anywhere -otherwise it is gambling and not investing. 

I believe they´ve chosen an excellent land for this project. 

You can do it for sure, but it's not going to be anything like managing your one property.And you've chosen probably the most difficult market in the country to do this in.Yes 25% was WAY high in this market.

You have already chosen your tax structure.