Three joeys? I strongly say get a second Hopper for a one time charge unless there are only two of you in the house. Even then, for back-up alone get two.
Take some time and read what others have taken time to post. You're only getting a couple of posts of advice when there's so much others will tell you both before and after their install and what they wish they had done, or are glad they have done.
Just right from the beginning, there will be one Joey that can not watch live what they want if the Hopper and two other's are watching live, and less Joeys will be able to if you have programs recording. It only takes two programs recording and one person watching live so that no other Joey can watch what they want live unless it's what the one person is watching. (More can watch at night if you use PTAT however and any can watch recorded programs, also if you get an OTA tuner that adds how many can watch)
I totally agree with you so I definitively want two hoppers. Now the decision is will i be happy with one new and one old hopper. I really don't like contracts and getting OLD equipment though