wise tension head.
would be the first thing i would do.

cam lock base clamps (if it doesnt already come as standard) from higher tier gamma machine should fit (consult with gamma to confirm) is an upgrade from friction lock... but thats just a convenience feature.

Electronic tension head for sure (whether it be Wise or a competitor)
Best strategy is to continue stringing and set aside those earnings into you "upgrades" pool. That way you can monitor the rate that amount grows. This will help you budget and plan how long it would take for your hobby to cover these upgrades.

Good luck!