A very intersting concept and I am sure one that his staff of experts has developed a very detailed business plan.  At one time I thought about something similar.  I could have used it at fairs etc. but just did not want the hassle in the end.  Anyway, my research showed that 50 grand is on the low end and with the high end costing upwards of four times that amount just for the truck depending on if it was used or a new truck and/or new or used equipment (maybe he had the foresight to save the old YC kitchen equipment-HaHa).  If the GM's past history is any indication  does anyone truly believe it will cost 50K.  I don't. 

As this is a private association I wonder if one needs a permit to operate? 

Now there is a positive side.  The fact that the truck is mobile it can be used to go to the YC patron's home and bring them a hot or cold meal.  I would be all for this especially if it had a catchy tune like the Good Humor Truck.  Just think about it we could wait at our door and when we hear the jingle we could run out to meet the chef with a big smile and order our breakfast lunch or dinner.