Before we are forced to close down surely it would be worth going for the non-dedicated option (or virtual private server, whatever that is!) with the same company which should be a lot cheaper than the dedicated option and may not require much work, if any.
The amount of traffic on the forum doesn't seem that much to me in comparison with other forums I use.
Even if it's a bit slower, I for one could live with that if it means we keep going.