Have you looked into wood chips? My parents started woodchip gardening a couple years ago and it’s been the best/easiest garden! Just pile in woodchips as deep as you can (probably 3-6 inches deep). The wood chips stay moist so you don’t have to water as much and as they break down naturally they provide fertilization. You also won’t need to weed very much also as the thickness of the woodchips keeps them from popping back up from the soil underneath.

My parents get the woodchips from the county, and they’re free they just have to haul them themselves. If you have a similar sourcing situation and a trailer, it’s a good option.