We have had 3 CRIOs since 2009 because we run 2 teams out of our shop. We use 1 per competition bot, and 1 as a practice/programming bot. Last year when we only had 1 team we ran 1 crio on 1 robot and had and identical practice bot, and also had the programming bot, each with its own CRIO.
This year we are planning on buying 4 new CRIOs. We will use the old ones to keep the old robots up and running. We will then use 1 crio per competition bot because we are running both teams again, and then each team will be making a practice bot that will have its own CRIO.
So we will have 7 total CRIO's
Is this too much?

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All statements made are my own and not the feelings of any of my affiliated teams.
Teams 1510 and 2898 - Student 2010-2012
Team 4488 - Mentor 2013-2016
Co-developer of
RobotDotNet, a .NET port of the WPILib.