The best plan to open a small food-prep/delivery business?

I am considering trying a small food prep & delivery business. Not a sit-down restaurant...I cook the food and deliver it. I already have a Tax ID# (in my "past life" I did contract accounting labor), but I'm assuming I would also need to incorporate or something then file for a food license (I live in TX)? Sorry, but it's been about 15 years since my last business course. Another big question is, I would like to do this either out of my home or from a small building I could have built here, but...where I live is zoned residential, not commercial...I would tap into the electricity/water that runs to my house; could this effect my licensing? Does anybody know the minimum equipment requirements? Stainless steel sink, countertops, etc etc. I need all the info I can get. TIA