I highly doubt it there are spots, but you can call up the kart club and ask.. 500 seems steep, but could be right, a race meet a fair amount of stuff goes on, i was told tyres would last about 5 or so practise sessions, there about 200 bucks a set i think.. and a pratise day at cameron park is under 100 i think... still think it would end up being the cheapest competitive circuit style racing you could do?...
those rally hatches are converted to 4wd though im pretty sure?... like focus, puegot citron etc.. and got heaps better enigine in them..