I would like to see how many of the aviation NDBs I can receive.
Loops work well, too.
Yes, I do have some space available. Height at the peak is about 6 and a half feet. For VLF, unless you have acres of land, an active antenna is your best bet. I'm good at building things so an active antenna is doable if someone could be so kind as to point me at some plans so I don't have to reinvent the wheel.