Keeping plants at home for caterpillars?

I plan to get samia ricini some day, but we have long winters up here where I live, however, I can order Ligustrum to keep at home. Is this possible, how many plants would I need and how much does the average caterpillar consume?

Thanks in advance!
Atahan

Oh they sell those, but certainly harder to obtain and more expensive. I might go for Ligustrum Ovalifolium because it's cheaper, but I'm unsure of how much I need!