I think it would be cheaper to buy a inverter and then buy $20 appliances from Big W, than to go out and buy 12v appliances from a specialty store. You will need the solar and batteries to go with it though, what do you have?
As a example I have 200amps of lithium, 780watts of solar and a 3000watt inverter. With that I run the hotplate on the stove, coffee machine, toaster, mixer, 215l compressor fridge and the hot water heater (only just though as it takes 2/3rds of my battery power)
The old man has 800amps of lithium, 1500watts of solar and a 6000watt inverter. He can run anything he wants, including his split system A/C.