I have a Public c7i, but my loaded up weight is about 35#.

I highly recommend this though for any step thru bike! Makes lifting way way easier and makes it easier to maneuver your bike.
Bicycle Frame Handle - The Little Lifter | Leather handlebar tape & bicycle accessories | Walnut Studiolo

I understand removing the wheel as a theft deterrent, but the last thing I want to do is lug around a dirty wheel all day! No thanks, I've got enough to carry!

As for good accessories? Get a rack, fenders, lights, and a chain guard. (and a cargo rack and bungee cords) I find my basket, I just bought one from Ross and bungee-d it to my front rack, is perfect for my purse, small bag of groceries and gives me a place to drop my sweater if it gets too hot. I now want a slightly deeper on. I like the metal racks, but I feel a lot safer throwing my phone and keys in a woven basket.

My basket is about 7 inches deep and I rarely use the cargo net to keep stuff in. I carry large purses.