Pig Shelter Help and Advise needed

Hey everyone!

I would love to raise 2 pigs for meat on my homestead, I intend to move them once a week or less, I am trying to come up with some lightweight and mobile ideas for a shelter for the pigs.

I have an old plastic oil tank that I was thinking of using for this job. It would provide 17 square feet of space on the inside and I am wondering will this be enough space for 2 pigs from wieners all the way up t butchering weight?

I am intending on raising berkshire pigs

Thank you in advance