Bikes, cars, food, beer, rent and too many other things to mention are a lot cheaper in N.A.
That’s not true in my experience. We normally visit the Mid West which is the cheap part of the country in terms of housing (i.e. away from the coasts) and houses are ridiculous, about 1/3 the price of the UK, however used cars aren’t. The cheapest used cars you can find go for $1,000 and they are utter junk, because there’s no MOT equivalent in Wisconsin so you get holes in chassis so big you could hide stuff in them and they are driving down the road visibly bent in the middle. God knows what the rest of the mechanicals are like. Restaurants are cheap yes but buying a weekly shop in a supermarket is surprisingly very expensive. We’re always shocked when we do it. And the choice and quality is poor.
I can’t speak for Canada, and I’ve not spent time in a domestic part of Colorado but I’d expect it to be more expensive than Wisconsin.