Yes, the mesh is metal.
You can do it yourself. They are not that heavy.
Yes, there are plenty of options to buy 1 panel. Just search for chain link panel.
All 4 together equal 20 ft
You can lift it off the base, yes, but not if you use the clips that come with it to clip the panels together,
Hi PD, unfortunately the Homedepot.com is not able to provide stock information regarding stock of Canada Home Depot stores, and we are unable to ship there as well. I would check with the referenced Home Depot online site: https://www.homedepot.ca/en/home.html Also, I would advise you contact your local Home Depot stores for capabilities and availability of products. We appreciate your business and look forward to serving you in the future.