I was looking at inverters a few days ago, can’t remember who it’s made by but a 750-watt sine wave inverter was $1100.00
Still pricy compared to what a 750 watt generator would sell for.
My brother has a 2000 watt generator that cost $125.00, he bought it last winter. Yea it’s Chinese made, but I would make a guess that the inverters will also be made in China.
True sine wave inverters will still be expensive. Your brothers 2000 watt generator isn't likely a very clean source of power and I doubt it's true sine wave. If you don't need true sine wave you can get a 1500Watt (3000 peak) Xantrex inverter on Amazon for the same price...around $115. You can also cover the gap and get a 'modified' sine wave inverter which does a fine job as well.