We (me, DD1 and DD2 - then 13 and 6) made a huge change in 2012. We moved from inner city Glasgow back to my native Dorset, to a smallish village just outside of a smallish town.
It wasn't easy the first year, I missed my friends, I missed having city life on my doorstep and all the lovely stuff that went with that (including public transport), my kids were hugely unsettled for a while but that first year was survived and we do live a much simpler life here.
Open spaces galore, a quite home to live in with no 24/7 sirens and buses/taxis. We have the beach and spend a lot of time there. We spend much more time doing free stuff and less time shopping or going to 'things which cost money'.
It's definitely helping me, I have severe anxiety and going out in public is stressful enough so going to somewhere like a beach or the forest is perfect, I am outside, can move away from crowds and don't feel hemmed in.
Obviously we do spend money but I don't feel like we spend it on stuff we don't need. Dp works full time, I'm at home and therefore do all the food shopping and cooking. This cuts our food costs down.
In the summer I often cook food, wrap it all in containers in foil and then we head to the beach for a swim and dinner on the sand. It's a nice life, a slower life and definitely a healthier life.