Cheapest form of motorsport?

[rob13]

Im looking to get into motorsport in some shape or form but want to be able to see whether it is sustainable first.

Which is the cheapest form where i can cut my teeth? Minimoto? Karting? Lawnmower?

[rob13]

i would have thought racing karts would be one of the cheapest options. Is there not a budget race series (TKM?)

Id rather do some form of track motorsport rather than say hillclimb or drag. My girlfriends dad has an old Suzy 4x4 LJ and i was gonna get that running to take green laning but i think i have more of a thrill of speed.

I also ride bikes but dont fancy throwing my bike around a trackday as ill probably bin it