Is there any way to post without having to enter my password every time?

I was going to ask if there's a clear path from the 'entry level' formula type cars to, say Formula 3000 or some other expensive/pro series. Just wondering what the hierarchy is of the seemingly many flavors of Formula cars.

It'd be great to know what kind of performance (HP/Wt) each of the cars in the chain offer, how much each level costs to run for a typical year, etc.

Does such a description exist?