Gardening shoes

I need new shoes for the garden. My previous pairs have been the lad's old leather school shoes, but he's now got size 13 feet and is 33, so you can imagine how old his cast offs were. Then I bought some cheap boys school shoes which didn't last a season.  The new ones need to be easy to get on and off, waterproof or near enough and comfortable and preferably durable and cheap!

I wondered about some wellie shoes or some 'chelsea' boot type of wellies. Normal high topped wellies are out, no room in the porch.
Any suggestions? Anyone a fan of wellie shoes?