Depends on what you need to do. If I was relying on those shoes to carry me on a year of living in the mountains then I'd want them to be good. However, if I just want a spare dry pair to potter round my survival shelter anything will do.

Also bear in mind that if these are 'one use only' then cheap ones might do - the spare hikers in my car are nearly new cheapish 'trainer/boot' hybrids. I don't have huge longevity expectations, but I need them to swap for dress shoes for a maximum 45 mile hike to get home. They'll last for that.