It looks like you are on your way with this. I will keep my fingers crossed that the weather or somebody's horse doesnt abuse all your good work. Will you have to put lights inside to keep the temp up? How will you control water runoff inside? How about some jalapenos or other peppers? They seem to grow well in most climes. Maybe some nastertiums as they seem to keep bugs away. It also might be a good place for a couple of chicken nesting boxes if they didnt eat the seeds and plants!