Bill, that cost seems reasonable to me too. I expected it to be more based on your earlier post. Keep in mind that you should do all the grunt work ahead of time so that when the clock is ticking at $75/hour they are not waiting around on you.
First thoughts related to that are, motor mounts free, coupler free, wiring free, etc..sometimes it is the obvious stuff that sucks time on the dollar. other thoughts are, 'the motor is 36" wide with all accessories attached, and the companionway is only 30", if I remove the starter, alternator, fragile carb & fuel pump, the motor is only 28" wide...(those are hypothetical numbers for discussion here typing in the garage, they are
NOT accurate or tested..you know, things like, I never thought this piano would have trouble fitting thru the door.
)' - etc.etc.etc.. plan it out and haul it out!
go with what works for you, but don't be afraid to call on experience!