Why are you going to limit them with the pots? They don't need special soil, and moisture control is much easier in the ground as long as you don't live in a region that gets massive amounts of rain.
Granted if you grow similar things season after season in the same soil, it'll need amended with compost or at least fertilizer, but the same is as true growing in a pot.
In other words if the grass is green, it doesn't need watered in the ground. Grass turns brown, it needs watered, but then you can water deeper a couple times a week instead of daily. However, I wouldn't let it grow directly onto the grass, because then how will you mow it?
It is really easy to go overboard growing things, extra steps and expenses, when ultimately it's mostly about the space and sun. You can go to great measures trying to grow a few plants very large, or just grow more plants in the same space and get similar yield without a lot of fuss. I can see the urge to max out each plant if you bought something expensive like super hot peppers where the seller was stingy and only sentyou 10 seeds, but most things, after a season where you saved seeds, you have more seed than you know what to do with.