Oh I'd go bigger. Not trying to be a dick but those are big plants. Big thirsty plants that are only going to get bigger; and thirstier. How's your back?
I like that idea alot but also I'd be scared of the plants acting as a sail and knocking over especially when they fruit up
Where I am is pretty windy sometimes and if the pots dry a little too much they fall over easy
so bigger pots are usually better for that reason, some people put stones inside the bottom of the pots