Absolutely this ^^^^
Due to powered cabs being so popular, good powered mixer amps can be picked up for little money s/h, and the Yamaha EMX stuff is brilliant. I have an EMX512SC, 500 watts x2 , 8 channels and lots of features. Can be found for around £150 ish s/h, add a couple of decent passive cabs (also cheap s/h) and you’re good to go, with cash to spare for a monitor for your singist too. 😀