Looking at buying a TT. What size Generator is needed?

I had a Honda EU3000, loved it but it would not run my 13,500 A/C in the mountains. It would run the A/C anywhere else. Sold it for what I payed for it and bought two EU2000 Hondas. All is good now. I take both most of the time but if A/C is not needed, I only run one. I keep both chained in the back of my P/Up
and slide out onto tail gate when running them. You cannot beat the Honda or Yamaha generators