335 width Z-rated tires on what looks like 20" diameter wheels is going to be about $500-600 per tire, roughly. these are Michelins, Pirellis or comparable, not the cheap no-name shit. the Aventador prolly has much thinner tires up front, so those would be much cheaper. i'd estimate a set of 4 to go for $2000-2500.
also, if you drive fairly normally (not like Clarkson), Z-rated tires will last you a pretty decent while, a year or more especially with the very low miles Lamborghinis get driven