I would get it installed professionally so they can zero in on the signal and get the antenna adjusted right, but don't expect a lot of support from either end once the system is in place. And if you intend to use a router expect bandwidth sharing delays.
I have had two different installations for business purposes - and this is the God's honest truth - both times the installer did not even have the 800 number for DirecWay available, even though you can look it up on your system status page at any time. Make sure you learn how to get to that page if you use satellite - it will give you signal status and strength so you can tell if you are linked before you start calling people.
And then, when you call DircWay all you will get after waiting on hold for 30 mins is - power down and power up in the correct order, wait 10 mins, and call us back if that doesn't work.
Again, it's better than dial-up if you are out in the boonies, but it's nowhere near DSL/Cable.