Oh, I see. So the other thing here is to be able to drive well, do not make too many mistakes. Historically there were special events with two or three hard races where many players had problems. Unsurprisingly that was always a hunter race. And yes, it was doable without paying gold (either to skip race or to boost the car), but it seems way too many players had issues, so in successive events those hunter races got nerfed and now they pose no problem. As for me, I have blown several races during GT500 events, driving too carelessly or just badly hitting a corner, and dead halt is usually not recoverable. But in the past several months it has never happened to me to fail a single race more than once or twice. If you encounter that, go to the garage to equip anything you can (I do not do that after every race), use cash to buy stuff in the shop, and especially think of that race, where is the problem and where can you gain (not hitting anything is one part, getting perfect start another, and yet another is driving inside the corners, use nitro effectively etc.).Or instead of trying again, start now by repeating past events to gain even more materials and cash to upgrade your car and get an advantage.
And one last thing - instead of paying 200 gold for skipping a race that gives you headaches, what about to buy a bunch of tickets and again race for new materials? Remember you get at least 30 gold every day from assignments (not counting missions and car series) and you get some more gold after every SE chapter, so you can spend gold even if you do not pay. In some SEs it may be wiser to buy more blueprints for that gold to reach another star sooner than to spend it to skip a race or buy a missing material.
Good luck in your racing.