Move my rooftop AC unit?
It would be a lot of work for very little difference in noise. All in all I imagine it would be cheaper, and more effective to buy a more quiet a/c.
I don't know what is up with newer units, but my old Armstrong unit is pretty quiet (in my opinion anyway) on low speed.
IMO due to geometry, moving the A/C even several feet forward wouldn't affect hitch weight more than a few tens of pounds.
The fact that I am opinionated does not presuppose that I am wrong......