Has Anyone Ever Upgraded Their Power Distribution?

I believe you could run 2 A/Cs off of 1 side of 50 amps , not sure
why you would want to do it that way tho .

Rewiring the coach for real 50 amps is quite an undertaking

In my opinion you would be better to just use the extra cord dedicated to
one A/C as Jim@HiTek described .
Many people have done it that way .

You could make an adapter so you could plug both into a 50A receptacle
when you wanted to .