Hi, I'm looking to go for my race license next Friday as a rookie (I’m not fast but not slow) I’m looking to get into racing but when I got the calculator out it is veeeeeeeeery expensive for entrance fees and tyres.

In the UK D211's are a fair bit cheaper, and would be cheaper still if I bought a season’s worth of tyres in one go.
Is that allowed? Or can we only get tyres supplied from autodrome?
Looking at ways to reduce this cost, otherwise will probably go in for every other race if that is possible?
There are a lot of people who would consider racing if it was more financially attractive, at the moment it is a very tough financial decision for me to make.
Advice appreciated.