

I was curious so I took a closer look at Sheltermanager and, honestly, I’m very impressed. They have a free demo on their site so you can show it off to people and see if there’s any interest.
And agree, self-hosting doesn’t sound like it would suit them or you, but you asked in an opensource thread and that is nearly always self-hosted. SM looks quite fairly priced for a hosted solution.
Yes.
But in the same way that every US company is ultimately controlled by the US Government. And every EU company by them. And every other country by their own government.