That much isn't necessary, GPT4 api costs $0.03-$0.06 for what's more than an essay of text.
It's affordable and accessible to anyone with a credit card. Ethically this is more fair than having to pay for over-priced textbooks.
The average person/studen can't install a llama 2 model (70 billion parameter) that can compete with ChatGPT-4 (the paid version), considering most students have notebooks, and lack top tier GPUs. Most would have to go to a "free" cloud providers.
ChatGPT-3.5 is also free, and compares favorably against the lower parameter llama 2 models. But, llama 1, lower parameter/heavily quantized llama 2, and ChatGPT-3.5, are not practically comparable to ChatGPT-4, for most tasks [1]. I haven't found a use for those, in this sort of context, except for increasing my blood pressure, with the time wasted being my justification for paying $.70/day.
[1] https://www.promptengineering.org/how-does-llama-2-compare-t....
It may be free, and easy enough to install. But to get it working, well I still have been unable to figure it out.