I got this access coldframe locally via Spock £20. I already had the small house & used decking off cuts I already had!
https://imgur.com/a/JifHfEN
So this was what I started with. (I made it myself (so don't look too closely! )
https://imgur.com/a/YCeQGjq
I painted it all with wilco "seagrass" & put some log roll round.
Currently in use by a little lodger!