It's not viable unless they get an x amount of foot traffic, which is why these shops tend to be in city / commercial centers instead.
That said, back in my hometown we used to have multiple businesses on wheels visiting once a week; ice cream truck, fish, a grocery shop, a mail-order frozen-products guy, etc.
I've seen the same happen in a commercial district, mostly big office buildings with underground parking, but there was an ice cream and a coffee trike doing the rounds. The coffee one would set up shop at the local train station in the morning, then move to an urban park thing later in the day. The ice cream truck would move around, stand in front of the building and ring the bell.
That said, back in my hometown we used to have multiple businesses on wheels visiting once a week; ice cream truck, fish, a grocery shop, a mail-order frozen-products guy, etc.
I've seen the same happen in a commercial district, mostly big office buildings with underground parking, but there was an ice cream and a coffee trike doing the rounds. The coffee one would set up shop at the local train station in the morning, then move to an urban park thing later in the day. The ice cream truck would move around, stand in front of the building and ring the bell.