Great experience! Do you get away for cheap or is it an expensive sport for us "normal" people (I take it you are one of them)?
in my opinion I am quite a normal person and have not a business or something. These events i mostly paid myself.
It is i think important that you learn and explore your abilities and a bit self taught. Luckily I have a few abilities in which I can position myself, like design, wordpress, videography, editing, etc. But basically filming and editing i just actually learned in the last 1,5 year and rallycross kinda helped me with it.
Racing is never cheap, but you can lower the costs quite a lot if you have certain knowledge, connections, etc.
Renting the car was 850 euro (excl VAT). A normal person would pay also VAT, so the price actually would be 1028,50 (if we use 21% VAT as here in the NL). Luckily my brother, but also my parents, so I have let them pay it, so that reduces the tax already. But now the interesting part is, if they would keep the 850 euro, they would pay 15% profit tax at the end of the financial year, but also another 15% (from the 850-15%) for dividend tax. If you remove that, than it is actually just 614 netto. So you could save up to 40%.
The biggest investment what is needed first is the clothing. So check for deals, quality and things that has a long FIA approval. And if you can do the trick up, it could save you a few bucks.
The last event i basically did for "free". But that is because i updated the website of the team. So in that case I used my abilities.
Connections is also hugely important, maybe even the most important. I now connected with another team with quite history. Last weekend I visited a event, and he introduced me with an other driver/entrepeneur. Now it is possible that I will race another "free" weekend in an other car, because of that. That entrepeneus not want to sponsor me (maybe yet), but does give me an opportunity, just because of my abilities. Now I not need to give anything in return, but I will do a quickscan of his website than. I hope with this I will kinda overdeliver and create a suprise value. Sometimes its not all about money, but the value and capabilities that can give no other.
So in the end my original supporters, i have a few small sponsors or partners what i do the trick with, who now have only paid for two events, but will be getting back 4/5 events for it.
Although I have no original connection with racing background in my family or something, I just start up from zero you could say. It needs a lot of dedication. You could see as a parttime job next to you fulltime job. A lot who do race have had the connections, or their family raced, or have the money.
One thing what can also help if you are technical well. So if you can run and maintaie a racing car. That could reduce the costs also a lot. Although you still need an investment to buy a car and things.