I have the Honda 3000 and a pair of Honda 2200s. Neither setup will run a roof AC AND microwave at the same time. I have a portable AC (110v on wheels with the dryer vent) that a single 2200 will run.
The problem with the Predators is their peak power is significantly less than what you'd expect, not a direct comparison to the Hondas. They are not bad gennys, but if you were targeting the 3500 you need to get the 5k. I had purchased a pair of their 2ks with the parallel kit ...a single would trip the breaker when attempting to run my mini-split on the enclosed and both in parallel would come off eco mode with the same load... a single Honda 2200 won't even come off eco mode with that load and the minisplit on turbo mode.
All that to say, sounds like you want the 5k genny.