ooo000ooo, it's called R&D. Advanced FEA packages cost many thousands, qualified engineers and office overheads aren't going to be cheap, plus the actual testing time including wind tunnels and test beds, dead ends explored, free frames for pros… the list goes on.
How much does an F1 car car cost? for 600kg? come off it! my laguna weighs 1600kg, does the national speed limit, has a radio for only 20k 🙄