Hell no. My local Makerspace has various low end CNC machines ranging from an old 800x800mm XCarve (3 axis only), that's useful for teaching people and using cut-offs from the wood workers.
We have a donated 4-axis machine as well, we've been getting up and running. Replaced the proprietary controller board with an Open Source one, and mostly just need to calibrate it and figure out an effective post processor.
If someone is letting you use their CNC machine for free, then sure. But whoever is paying the costs associated with maintaining that machine and buying materials is going to be paying more than 60/month.
Again no. I'm the person maintaining those machines. The maintenance cost is practically zero. Occasionally (every few months) we may need to buy a set of 1/8" bits (for $10).
Entry level CNC machines can be assembled pretty cheaply. eg PrintNC:
We have a donated 4-axis machine as well, we've been getting up and running. Replaced the proprietary controller board with an Open Source one, and mostly just need to calibrate it and figure out an effective post processor.