The LMP2 Oreca or Alpine badged Orecas use spec engines. The ones that run in the US IMSA series use large block Chevy crate engines. Those cars are around $500K with no spares or other race support equipment.
A car like a Porsche 911RSR race car can be bought from the factory for just over $1M.
When I see a wreck it makes me flinch after knowing the prices.
I also cringe seeing vintage steel and unobtanium go crunch.