Aw, you don't really need a full reset really. Toh being only 3 years older than Low is not bad. Both of them (and if Teng is a sub) you should already have 200k-300k overextension. But yea, your plan to train from scratch isn't too bad as well because you can slowly stockpile money while building your overextension tax exemption.
This season I got 400k exemption, and it was really helpful, because even though my squad cost 1.1m (I was losing 300k per week), training exemption ensured I didn't have to pay extra tax (which is 50% extra for every dollar you go above the threshold).
Regardless, I wish you all the best, and look forward to seeing your next big project after Toh :D