1 yr is a very short time to get a business off the ground. That being said, with you being injured long term, if you shut down the shop, it wouldn't be you that "crushed her dream". You gave it a year, and it didn't work. I would tell her tough shit, and to go find a job. If she is serious about your marriage, she would realize that she is contributing nothing to it financially, squandering all her time there, and its all basically for her pleasure at that point. I don't know anyone who likes working for free. If she is hellbent on doing it, have her do it from home. Why pay for a storefront and other unnecessary overhead?
As for you, I would try to find work in some way, despite the injury. Sucks but you are in a losing battle until you start to make a positive income. No real way around that.