It kind of sounds like you are jealous of the guy for having a Huracan when you have a 7 figure house. If you can afford a 7 figure house there is no reason why you cannot afford a Huracan in the garage.
From time to time I go on long walks around different communities in the city and as I walk past the houses I look at the condition of the house as well as the cars parked in front. What I notice is that there are a fair bit of $5k - $10k cars parked in front of so many houses. Houses which the "owners" are emotionally invested in believing that they are worth 1/2 million and more. If that were the case, how come their second most expensive possession is 1/100 of the price of their most expensive possession? I try to place myself in the mentality of the homeowner and better understand their mentality, but I have been unsuccessful...
Anyways... Your core competencies are in being a lawyer and more specifically in whatever branch of law you have specialized. You don't have enough transferable skills/knowledge to be successful at operating a dealership. You are passionate about cars and your motivation to open a dealership is so that you have at your disposable a fleet of interesting cars. This does not sound like a good reason to open a dealership. You might be better off focusing your resources on furthering your law career. In time when you are financially better of you can assemble your own fleet of cars.