AJ, that forum looks a mess
If you do a search on google like "Build your own server" there is a lot of info you can get.
The server that we deal with that hosts TGHQ "Siteground" will cost about $180USD a month to run but that with software etc in that, plus you wont have the cost of upgrading software all the time. Because we have an account there will be no setup costs. But the server would be able to host a lot of people.
The other alternative is to get a pc with a high gigabyte speed. which would be about $500AUD the server software about $1ooo.00, this should service about 50 to 100 people. This is cheaper but higher in maitenance costs.
To pay for the server of $180.00 a month you would need 100 people to pay say 2.00 a month for running it, and they would have to be a paying member for a year, to make it worth while.
This is what is costing for most servers for online Browser based game, like Astro Empires, Napwar by Caplay etc.
We would need some info help from Histwar on this as well.
But it is doable