Might want to retool it for self-storage businesses. There are a ton of independent self-storage locations (at least in the US) and they predominantly use hotelier software/SAAS. But what makes yours different is that it's modern and looks good. This is a HUGE plus for client-facing services, especially bill paying.

Yes, they're cheapskates. And there's a ton of them, so initial sell is high touch. But there's been a lot of modernization among them, yet their client-facing web presence really isn't being served. So once you've got them, I'd expect to be able to hold on to them--low-touch--for a very, very long time.

Just an idea...