If you want to get into designer/developer mode for clients you are likely going to have to learn to host your own servers (note: I don't mean physically, I mean services like Rackspace, etc). If they're a couple static (ie: no server-side language) pages that won't get hit very often, you might use github's pages functionality.
I'd go with Rackspace over linode due to the great feedback I've heard about Rackspace, whereas I've heard relatively little about linode. Personally I use Heroku as they have a free tier that helps when just "getting stuff out there". The problem with Heroku is they don't have explicit support for PHP, so that could be an issue for you. If you're going to go after big client work, Amazon Web Services (EC2) familiarity is a nice checkbox to tick.
Remember a server is just a computer. If you can set it up to run on your computer, you can set it up to run on a server.
P.S. Get used to being in over your head. It's the fastest way to get up to speed, just learn how to swim underwater.