I don't own a Leaf, but I do own a Volt. Assuming rate of charging is comparable I'd say you'd be taking a risk if you only have a wall plug at your destination. I'd be a lot more comfortable if you had access to a 240v charging station for that 3-4 hour span.

Also I've run into more than a few wall plugs that weren't up to snuff according to my charging adapter so there's some risk there too.

I wouldn't recommend buying a Leaf for your situation unless you were able to rent / borrow one and do your commute with it for at least a few days (preferably in unfavorable temperatures if your climate has them) to be sure it'll work out.