I defo recommend muck boots. I got them as a Christmas present 2 years ago and still wear them everyday now. I only ever have to wear 1 pair of socks, my feet are never cold in them and they are the most comfortable boots to wear. I did think they were a bit heavier/clumpier than usual boots...
I used to be on wood pellets but didn't like them very much and they are only marginally cheaper than shavings for me.
I am now back to shavings but have changed my routine. Instead of mucking out fully everyday, I only muck out once a week and what a huge difference it has made. My horse...
It's her horse and she can do what she wants, but that is just plain mean! Maybe it's a good thing things didn't work out, she doesn't sound like someone you would want to loan a horse from. I hope you find something else soon!
I've had a similar experience although went to see the the yard. All the facilities seemed to be as described. Didn't think to ask to see the fields though.
It wasn't until I moved I realised the 'amazing' arena had pot holes and stones everywhere. It was that bad the horses were struggling...