last home I had a thirty amp box installed on car port.
On the Fifth Wheel it had only one and it was on most of summers.
I don't remember if TV would cause it to shed one of the air conditioners but the microwave would.
We ran them most, of the time mid summer as we had clothes and food etc always on board. The refrigerator was running too and especially when loading or unloading.
We had the box wired with one ought cable, which was overkill but the box or plug never got hot nor the distribution panel in the basement.