Looks like it will be nice when finished. i would have done a few things different though.
not sure about code requirements but i always thought you should use pressure treated lumber for any wood against concrete/masonry. so the bottom plate of all the walls should be pressure treated or isolated from the concrete. the wood might absorb moisture through the concrete and swell.
i probably would have built the stand that neilan linked to and attached it into the wall
you can make a cabinet door flip up and hinge just like you planned to do with the drywall. depending on how soon you need it i might be able to help you out with that.
just a few things to consider
If you put off what you can do today until tomorrow it will never get done cause tomorrow never comes. It's always today.