If money is no object, and you are already a competent packer - it might be worth it. A turn rig allows you to get perhaps 30% more jumping during the day, and that can get you more experience more quickly, However:
1) Time in sport is still a thing. If you get 300 jumps in two weeks, you still know far less than someone who gets 300 jumps over a year.
2) Make sure you know how to pack. I can pack in 6 minutes, so unless I am trying to turn with a team, I don't bother with a turn rig. If this is a crutch because it takes you an hour to pack, fix that first. Get your packing under 10 minutes so you can pack and so you know your gear.
3) Make sure the two rigs are very similar; within one size of each other, and same or similar canopies. You are going to learn how to fly one canopy at a time, so make sure you are not switching back and forth in a big way. And if you are trying to lean high performance landings, make sure your two rigs are EXACTLY the same, down to harness size.