If I was to pay for a build who would be interested in building a aventador ?
pay someone to get your chassis together and running very well ,this is where you want to start , if your chassis/drive train ,brakes ,rims and tires are done ,your dream of driving a super car replica is half way done. how much can you do , depends on your final cost, this is the newest replica out so this will be no small under taking ,you will need a good bank account for this model everything is new and different from the last version. all new territory,on this build.
If you complete this "chassis build part" and run out of money ,you can get most of it back by calling one of the makers of this body kit & sell them your chassis. or save up some more money ,then continue on with the body kit. the aluminum chassis ventador was done this way ( frame first )and we all see their progress.