"sac89".....Many buy two of the Honda 2000 watt inverter units. During non air conditioner trips, you can usually get away with running one. The 2000 watt has an eco mode for average use, but you would need to turn that off to run your microwave. On warmer trips, you bring both Hondas and run the parallel kit. Typically an A/C unit requires a 3000 watt generator to start it up and keep it running. With the two Hondas and the parallel kit you have 4000 watts which is enough to run your A/C and some other items.
For about $2000.00 you could get two new Hondas with the parallel cable. Maybe buy one now and another one later.