We generally do the train, I think coaches might be tricky... train up to London Bridge (not the express, that will be more expensive) and then down to Folkestone, OR you can go via Redhill and Tonbridge - might be cheaper as you are avoiding London. There are not as many trains going that way, but it's not any slower.
This is my site The Folkestone Gerald that I built in a fever of excitement when I first moved here sometime in '04. I'd been a regular visitor for a while before that but I am technically one of those Down From Londons you get now. This site was a lot more dynamic with a calendar of events and voting for favourite venues and things, and I hear it was a useful resource for others who were thinking of moving to the area. Now I've moved out of Folkestone again (though just to Hythe) it doesn't get as much love as it used to. Ironic really as The town is becoming the exciting place we knew it was about to become. I am not Gerald by the way, this comes from the name of a fake paper in an episode of The Day Today or something, the Portsmouth Gerald, and how there is a local paper here called the Folkestone Herald. Puns like this are GRATE aren't they? Do contact me if you have anything to offer, email anythign @ this domain, or try @folkestone or @pauly on the twitter.