EWTN is on C-Band so you would need a 6 foot dish and any old Free to air receiver. Now I know personally that a 4 footer should pick it up but that involves using non-standard setups. If you are starting fresh (no equipment whatsoever) I would go with a 6 footer. WSI/Galaxy Marketing has a killer deal for a 6 footer http://www.satelliteguys.us/free-air-fta-discussion/226869-6-foot-c-ku-band-prime.html
I've got a couple of them and they work really well. There is also the Word Network on that satellite too if you are interested in that.
For receivers, unless you plan on motorizing the unit I would go with a simple Coolsat, Pansat, Fortec, Visionsat or GeosatPro receiver. All will work great and the last 2 you could hook up a hard drive to it to record programming.
I agree with ICE - - - you really need a 6 footer but some have been able to do it with a 4 footer - - - but you might want to consider driving around on the weekend and see if anyone might give you a big dish. If you are willing to put in some hard work you could move a 6 or 8 footer yourself - - - -
For fun today I tried to pick up the EWTN station on 133W analog...took forever to get the 6 footer locked and minimize sparklies (since its analog you can see artifacts on the screen)
Reaimed the 6 footer to 91W and locked EWTN at 80-85 quality
$70 for a 6 foot dish. Some of those have a base that the dish attaches too so you wouldnt need to put a pole in the ground.
A receiver you can pick up on Ebay for pretty cheap. Coolsats, Pansat, Fortec are all good brands. Or check the classifieds area here as folks get rid of receivers as they upgrade (or just end up collecting way too many of them)
yes it will. I have 2 of these and one is fixed at 99W and the other I "ghetto move" to various satellites. I can get all the way over to 139W which for me in Minnesota is a 21 elevation and its a good 6 inches higher than the ground. My highest satellite elevation (due to my further north location) is only 38 degrees whereas 91W for you is around 45 so it will work fine
Here is a pic of the ghetto moved one at around 38 degrees elevation