I finished the weekly races to get my 500,000 cr and covered the daily mileage for a 4-star ticket that with 2 cars and a pile of 500,000 cr standing there of course it returned only 10,000 cr.
So... after that, I decided to play some financial games and went to the valuation service in the used car dealership.
I ended up selling the AM Vulcan 16 for 2,000,000+ cr, the Toyota FT-1 VGT for 600,000 cr and the Espace F1 for another cool 1,000,000 cr.
Now I have about 5,000,000 cr that I can disperse to complete special menus and thus raise my current collector level (42). The beauty of it is that the sales do not lower your collector level.
The rationale for the culling? IMO they are gimmick cars: The Toyota FT-1 VGT cannot be modified in any way, it's temperamental, and I can swap it for the GR.3 version which is more useful and far less expensive. The AM Vulcan is a track toy not really fit for racing (and I got it from a roulette spin), and the Espace F1 I only purchased to complete the seasonal menu, and no I don't share the worship for it, and I got a bronze lap time in sport mode in Yas Marina, so that's 250,000 cr in the near future too.