Start earning year round.
Having a product like a mirrored house makes marketing much easier because it automatically attracts attention. Here's a unique option for you
Marketing - Host a free night on Monday or Tuesday. Saying yes to quite a few people if they are in the travel or experiences niche or take extremely top-notch photos or videos.
The initial money is for opening, and invite 1-2 bloggers (travel bloggers) to advertise, then customers will do everything for you.

Price per night let's say from 450$ (and up)
Attendance will be at least 80% of days per month.
11,250$ per month - Income

Also you can agree with gemplings, resorts, recreation centers - put your unique house in their territory and earn on subletting.
(70% to 30% for example) or as agreed.

Payback up to 1 year, then earn, expand and multiply your income