It really comes down to urgency on your goals. If you are in no rush, then I would start with the ELITE DIY Course.
If your child is serious, playing travel, and solving the problem is a top priority to reach goals then I recommend VIP 30 or VIP 90.
Most players start at VIP 30. It's a more feasible financial decision and the commitment is shorter.
Once players and parents see the benefit, most of the VIP 30 players end up upgrading to VIP 90.