Well, sure, LAMP is easy to set up if you're working in PHP; that's one of the huge advantages PHP has over most other options. You want to set up and deploy to a Rails server, though, that's going to be a bit more effort.
I do that regularly enough. For single server setups, I've got it down to about 60-90 minutes - and that's because I've been too lazy to automate it.
git push heroku master - FTW.