I must admit I had to google that specific AP because I've never installed one before - but I wouldn't envision thousands of dollars in install costs. A head unit and a few servos following the EO installation details isn't a difficult job. It also depends on dash access (i.e., do you have a blank in the dash already), servo positioning mounts, etc. Did your second hand system come out of another 210 complete with looms, mounts, etc?
It could be a close call - but have a word with your LAME before you flick the switch either way.