I sent this to our Web host and at this point, after really stretching their courtesy for about 3 years, we may be a point where the only resolution is to move back to a dedicated server.
Right now, there is only one other site on the server we're on. Between them and us, occassionally the load simply gets too high for the site to be usable. Probably a cron job gone bad somewhere.
The only way to fix it is to be the only site on the server, but that's called a dedicated server and the trouble is, the costs for going dedicated are pretty much impossible for us to cover considering we would need cpanel or somesuch to be able to manage the sites themselves (or pay extra for a managed server).
I know several of you have servers and such that you'd probably volunteer, and I truly appreciate it but the reason we've stayed with our current host all these years is the sheer high level of support they offer.
Otherwise, we're still looking for solutions.
Wayne