Boot covers instead of boots  

You're welcome!

Yes, but only with stretch fabrics

i think you can, but you need to sew fabric for the front part of the sole. so, it will cover and hold the cover. the downside of doing it is that will be hard to put in and take out the shoes for another cover. so, to avoid this too, sew the zipper to the back side of the shoes and sew extra fabric for the zipper cover

I don't have a pattern for this one but I do have some others on my etsy

It's a faux leather that I had bought years ago from an online retailer

It is sewn in

That too