Richard,
I have an ERA but I'm not nearly as big as you. I'm 5'9", 160. In my view, the ERA has a whole lot of room length wise. I have to move my seat all the way forward to be able to reach the pedals. Where it's lacking is in footbox width. I can manage okay with tennis shoes or dress shoes on but there's no way I could drive it with wide work boots on. With tennis shoes on I can barely manage to operate the gas without hitting the brake. So, if you're tall with skinny feet you'll probably be fine but if you have fat feet you'll be in trouble regardless of your height. Better check with your wife to see if you fall under the big foot or little foot heading.
Chris