@bairaghi, thats actually a goood idea. i have a marwari friend in pokhara who has like 8 thela gada (apart from a restaurent which he started 8 yrs back).and he has staffs who stand on the thela and sell street foods like momos, samosa,chowmin, sausage,jeri swari and pani puri. for this he has extra 3-4 guys working daily in his restaurent preparing all the stuffs and bringing it to the thela carts.and he is erning better than all other schoolmates of us who 'made carriere' working for it companies,govt officers and lahures.
http://www.enayapatrika.com/2016/02/20599
https://www.youtube.com/channel/UCmrL98X6YlYYxJulqpD_Utg