I’m not sure what will be covering the tires. They will clear the floor no matter what the axle does, so the box will have to be no more than 3” high. Still studying that one.
The door will be fun, I’m sure. I keep thinking about making a door or buying one (too many $$$ for that). But, having a 100 year old will be neat. So, my intent is to make it like a ‘pre-ung’ door you buy at the big box store. That is, make a frame and hang/seal the door in that frame. Then cut the hole for the frame. We will see...

I couldn’t tolerate sitting... so I went out and skinned the front wall. I used glue and screws. The screws are called self drilling lath screws. I always thought of them as ‘finish screws’. Anyway, they are pretty neat. Nice wide, good looking head that holds well.
I’m not sure what is going on with the pics. All I do is resize them for the forum and use the normal ‘upload attachment’ option. I wonder if the resize program is making it into some odd format...