imho where there it is enevitable ppl will start to spend less on moding cars, im not sure now is a good time to get into mapping cars.
i would expect even established tunners have seen a downtune in sales/work (based on no evidance just knowledge of currect economic climate) and i think as a new tunner you will struggle atm.
but maybe paying trader fee's and advertising might be a good place to start as its a minimal investment to start with.