Nope....
We have lost plenty of jobs because " They " were $250 cheaper, after questioning the customer of course with respect we find out there was No electrician as well no permit.... Just make sure he gets both, personally I really don't care as most HVAC guys know there shit but when everyone is on the same playing field aka following the law it pisses you off....
I would hold off on any HVAC system and focus on the improper duct-work for the upstairs, then once the issue is fixed go forward....