Ayuh,.... I've looked into 'em, 'n convertin' it with welded in doors, 'n windows,....
Been told there's No way to get it code compliant 'round here,...
Kinda knocked the wind outa my sails on that project,....
Got a 1 ton cube van box out back for storage,....
Locally, a 20' shippin' box retails at 'bout $2500./ $3000 bucks,...
Do abit of huntin', 'n you can cut that in 1/2,....
A damaged box, even less,...