sorry to burst your dream. It will most likely to
failed.
Yes it is a nice picture - perfectly steam potatoes and people
eating it happily. But the real world is not so.
Rental is expensive- even a cart nowaday cost Thousand
dollars - how many potatoes you have to sell per day to pay for
rental and your salary.
Steam is time consuming result in lower customer turnover -
also it is hot they take longer time to eat it - long turnover of
tables. = less business.
How long can your potatoes take to steam ?
After steaming that how long can it be keep at that stage
without taste and texture changes ?
Agreed. Perhaps potatoes should stay as side-dishes in the menu,
:S. Still, go in the direction of your dreams!