Explaning a lambo is fairly easily actually. Just make sure it's never technically yours. You just happen to drive it, but it's owned by some entity somewhere. Maybe a company. Maybe a foundation. Maybe a trust... So many options

I take it you don't live in an over regulated country. Here, driving a company lambo means paying
bijtelling: 22% of the dealer price (including high tax based on emissions, and sales tax of course) gets added to your income, and taxed at 49.5%. So a €499,950 Lamborghini Temerario costs you €54,444 per year in
additional income tax.
So again: it's going to be very hard to explain, even if it's not in your name.