I would go with a sheet of material hung from a line. Best way to stop arrows and cover a big area. Someone will be a long who know what material is best.
After that, you can use a lot of stuff for a target. large coffee bags stuffed with plastic and scrap fabrics strips are great and cheap to do. I get my stuffing from old targets, rags, pillows and mattresses. Bags from coffee distributors or someone that collects their bags. I get bags for $1.00.
Not sure on best place to get the equipment in Canada.