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@sjw
A lazy solution might be a cheap hydroponics kit (minus the light) from Amazon, and that's plenty of space for small batches.

I don't know about everywhere else, but it's legal here to grow and consume; spores are easy to get.

A quick glance tells me this page is a good starting point: https://hydrobuilder.com/learn/hydroponic-mushrooms/

Here's a little something I grew, and the teriyaki chicken I made for dinner for scale.