2x or 3x a bambu
I don't think the upcharge is multiples, but it is significant comparing the X1 Carbon to the Core One. If you want better value machines, I would look at other brands (but you also have to consider the long term value and the openness, how much is that worth it to you?)
But I would avoid Bambu. They are no longer the best value, they are not open, and they are not as reliable either (it does not "just work", the nozzle has clogged on my A1 and needs to be replaced, and regular maintenance is needed e.g. cleaning the bed like any printer), the worst of both worlds as I see it.