Well he sold his biz to Jay, so he must have used that cash to buy the new ride, cars are the worst investment though, max you should have bought some real estate.
Business wise, yes cars are an awful investment.
But I don't think Max bought the car as a business move, its a fucking Ferrari!!!
Also, I read somewhere that the value of a ferrari actually goes up once purchased, because the normal waiting time is 1 year + for one of those babies, if someone bought it and comes to sell it, the new purchaser can get it right away without having to wait.