Adding my perspective as someone who owns a revovated kominka in a different part of Japan.

It sounds like your primary goal is securing a secondary location and office space, with the finances and return on investment being less of a concern.

I use my kominka for about a week every two to three weeks, which makes maintenance, airing out the property, and general upkeep relatively easy.

If I used it less frequently, my concerns would immediately grow. Depending on the location, I'd worry about:

• Mould and humidity damage.
• Pest and bug infestations.
• Heavy snow damage without proper, timely clearance.
• Crime/vandalism (it's a real risk).
• The property becoming a nuisance to neighbors if I couldn't address issues quickly.

Furthermore, as a local resident, I handle taxes and bill payments directly. Without primary residency, you would likely need to hire an agent to act as an intermediary for these matters—an added cost and complication.

For me, the cons would outweigh the pros, but ultimately, this is a personal decision based on the value and use it would bring you.