If going to race one up here a trotter would be good value as the trotting fields here are pretty ordinary perhaps contact owner down south who have trotters to see if they have one that has reached its mark down there. eg eric Rothacker a horse called Maorita or hangin loose both show ability just my thoughts.
Personally I love the trotters,raced a couple of FFA horses over the years.
Problem is that you need a trainer with experience with them.
Also,there are far fewer races programmed for them.
Youre right though,the depth is minimal,same in SA.