When to table the model and stick to your beliefs?

My husband and I had a heated argument about debt. He believes in taking a calculated risk with debt; I believe in no debt. During the argument he kept saying you have to look at your mindset about this. As I sit down to to work an intentional model so I can find a thought I can believe about his point of view so that we don’t go through this same argument again (it hurts me and our relationship every time we talk about this topic) I started thinking, what if what he was asking about was something bigger, like an open marriage, which I’m not in favor of either? Do I just do a model until I find the thought that won’t hurt me and as a result the relationship? Or at what point do we table the model and stick to our beliefs? Thanks!