Dreamhost offers an automatic 1 click install. They also offer a 2 week free trial.
But as I checked into it they do charge a set-up fee of 9.95 which is applied to your hosting if you stay. If you don't stay it seems they keep it too!
So hosting...not so "free", install is free in your Cpanel.
But for 9.95 you can get in on the OpenVBX system and signing up with Twilio you get $30 credit to start and I know thats free because I am using it.
You are still $20 ahead.
No credit card to start or anything like that.
OpenVBX is not hard to install if you know how but I remember when I first started installing PHP/MySQL scripts years ago and it was frustrating at first.
So my friends if you have been wanting to get in on this but don't know how to install OpenVBX heres your solution.
Dreamhost+Twilio= Your own SMS marketing backend solution +$20 in SMS credits.
(If you want it installed on your current server-PM me)