This may sound weird, but is there any way I could get a hosting
company to run my own proprietary Java server?
What do you mean by "Java server"? A computer that runs Java? A java
servlet container or java application server?
You can get a "housing" service. That means that you bring your own
computer with your own software and manage it yourself. The service
provider provides you with internet access, controlled temperature,
constant current supply.
Or you can get a managed server. You rent (or own) a computer and the
provider takes care of the maintenance of the system software. The
software included in the maintenance varies from provider to provider
and is of course a negotiable matter. I am sure you can get a managed
server where even the JRE and the application server are maintained by
the provider.
It is very unlikely, however, that you get support for the application
software from such a provider.
A managed server of decent quality costs about 150€/month here in Germany.
BTW, to you, what is the best WYSWIG editor?
For HTML? I don't think there are any good HTML WYSIWIG editors at all.
They all produce very difficult to maintain HTML. In my experience,
which is a bit dated, the least broken one is Dreamweaver.
Timo