Magnum auto Buddha seeds

I witnessed someone's magnum grow,in 5gal pot with full coco,grew big.But since it's an auto and will likely veg itself for 4-5 weeks,no matter what big your lights are,100 gallon is huge and can easily be an overkill.yes. you can try planting some of those seeds together in 100 gal pot,I've seen people doing it with great results.But 100 gal still sounds like overkill especially in soil. 5 gal pots will do bigger favor than 100s.