One of my best friends is an HVAC wholesaler, and one of the few that handle both Mitsubishi and Fujitsu. I'm building a new home next year that we're thinking of keeping off grid, and Mitubishi is a top contender (Fujitsu also in the running). I think you need to call a few more HVAC guys, as that one sounds like an idiot.
Also, I currently have both Mitsubishi and Daikin units in different properties. Daikin is NOT in the running for the new house. Works OK, but doesn't hold a candle to the Mitsubishi in my view.