I am interested in trying to mechanically do this, even with the hope of eventually automating the entire thing so I get sent an email telling me what to do next

Of course! ;-)

Very diy.

Buy a used HP T620 or T520 or T630 thin client on ebay. Make sure you get one that includes the AC power brick/adapter, and 4GB-8GB ram, and an SSD.
like: https://www.ebay.com/itm/156460983475 or https://www.ebay.com/itm/326109395019

Or a new mini-PC with N100/N150 CPU. $100-$150. (Those are so cute I am tempted to buy one just because.)

I bought a couple T620's a while back for $35 each, incl shipping.
It takes a special power pack, but you can use a non-HP one by adding one resistor. It takes a non-standard SSD, which are available from Aliexpress pretty cheap. Add a USB pocket hard drive for more storage -- 16GB is pretty small.

I used to buy hp refurbished desktop(s) before I discovered the thin clients. You don't need much CPU power.

Install Debian Linux. Then write bash scripts to download data, do the screen calculations, and email you the results.

Mechanical Investing FAQ

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