question about giant land snails

[snailperson]

are they legal to own in Canada? I tried looking it up but i only found out stuff about the US and why they are not legal there.
another thing, what kind of bigger species of snails are there, that don't get as big as giant African land snails? Because, i cant seem to find any other ones on google.
also, how big should an enclosure for a bigger snail be? I'm planning on owning one, maybe 2.
also how often does a single snail lay eggs on its own? i asked this before but didn't get any answers yet.
also where  can i find actual moss to grow in a snail enclosure? 
thanks for reading, hoping to get some answers!

[Bogs]

They may be illegal in Canada, but im not sure. It has to do with quarantine laws because they can carry a nematode that can cause meningitis (swelling nerves and possible death) i dont know if other species of the achatina genus are illegal, but theyre also large. tank size, id recommend something quite large, but snails arent smart enough to get depressed in a tank thats not massive. as long as it has room to roam a little, itll be fine.