The idea of buying commercial property and then building a commercial kitchen to support a mobile food business doesn’t make a lot of sense, at least to me.
First, consider the cost of the land. I don’t know about where you live, but in most areas, land zoned for commercial use is not cheap. A very small lot could easily run in the high five figures up to mid six figures.
Next, consider the cost of the building. A simple shell with one or two walk-thru doors and minimal windows will cost you upwards of $50.00/square foot.
Next, you’ll need electrical, plumbing and HVAC. Money, money, money.
Next you’ll need equipment. More money, even if you buy used from ebay.
Then, once you’re up and operating, how much will it take for daily operational costs? Don’t forget, you’ve got sunk costs, fixed costs, and variable costs, no matter whether you use it one hour a day or around the clock.
On the other hand, if you can find an existent commercial building that you can convert to a commercial kitchen, it will cost a lot of money, even if it’s not in the best of shape. More than likely, you’ll have to demo the interior to get it ready for your needs. Then you’ll have to equip it. As in the first scenario, you’ll still have daily operational costs.
As a business model, this shouts "disaster". It’s tough enough to start a mobile food business that will make enough to support you and your family, if you have one. Even under the best of conditions, it will take time to establish yourself and to start making a reasonable living, if ever. Adding the burden of buying/building a commercial kitchen, makes it durn near impossible to ever make any money.
If you’ve got a pile of cash burning a hole in your pocket and don’t care about the economics of the plan, go for it. If you want to get rid of the money with far less effort expended, find a hole and throw the money down in it. The results will probably be the same.