Tim will die of old age before he runs of food. The average supermarket has enough calories canned or vacuum packed to keep you alive for 50 years. 70 if you dont mind dog food.
Find a place with a rainwater tank. I understand these are pretty rare in some parts of north America. By law every house in my city (south Australia) needs one. You may need to use the Lamborghinis to tow a rainwater tank from the hardware store to the house you want to shelter in, and plumb it into the down pipes, so you've got something to drink when the bottled water dries up.
Power / internet / water will probably all be down the next morning. There are beacons of reliability in these systems that could last months without human interaction but a weak link in this under maintained grid of USA infrastructure will break the whole thing pretty quickly. Sewage will backup - He'll be using a hole in the ground for the rest of his life.
Find a nice secure place, put up some solar panels, get a rifle to keep the wildlife away, and empty a few supermarkets of everything canned. Learn a bit of electrical engineering so he can wire up to solar panels and get an inverter and battery going and keep some comforts like ac / fridges / hot water / cook on a hot plate. Learn how to cook. Learn how to use a stolen cosco forklift to load a trailer attached to a Lamborghini with a pallet of canned food. Learn how to reverse parallel park that in his shelter. Home handy man skills. That's basically his first year of skills.