We provide a proxy service for foreign buyers, basically your arm in Japan without having to travel or know the language.

I would stop short of saying I found the inflection point of optimality and being pragmatic. 

For seasonality, I take into account holidays and local events that might drive demand.I'd be happy to connect for more ideas! 

But, if you’re traveling to check out a property you already own, that could be deductible.

Who would do that? 

Stairs are the only way to get in, no grab rails in the bathroom, ramps that are too steep, etc.From what I've read, all commercial businesses/buildings (including ones before the ADA was passed) have to comply with the rules, unless it would be outrageously tough to fix (like installing an elevator in an already built building).Are all these local business just not complying and taking the risk, or am I missing something? 

They probably want to be certain YOU are legit.Most of the scams I've seen are by non-owners. 

We also have a big demand for traveling medical professionals, etc.

I would add this - what are your life goals?

Any advice or guidance would be greatly appreciated!