the horse is . . .
. . . get some experience with FTA.
See if you like it.
Decide which satellites are more interesting to you.
Maye you'll want a motor?
Maybe you'll want a T-90 multi-LNB dish for instant switching between birds?
Perhaps you'll go with a few fixed dishes for your favorites, and a motor for feeds?
Knowing answers to these questions will help you choose proper LNBs , switches, and other equipment?
Will you add C-band?
Those are the 6..8..10 foot dishes for 3.5-4ghz reception.
Will you want to subscribe a 4DTV receiver on Cband?
Which rooms in your house will have access to FTA?
If you look in the BUD section of the forum and take note of some of the work by Linuxman, he's got multiple systems in his house, and each has multiple dishes!
There may be some duplication, but he's got redundancy.
I've got a retired TV station engineer buddy who has multiple Dish receivers in his house.
They're all wired into modulators and distributed throughout the home on channels 6, 7, 8, and 9, along with the few OTA channels from the area.
It's a different way of hooking up a multi-channel system.
So, if you're just starting out, it's hard to know what equipment you'll eventually have or want.
For now, start small.
Get a dish, get a receiver (and probably a motor), hook it to one TV, and see what you find that suits you.