There are inexpensive USB scopes. Have you researched any?

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Recently my old Tektronix 432 gave up the ghost so I had to resort to my standby USB Syscomp (older model) DSO-101, for the majority of the projects I work with it covers quite adequately. And much smaller/lighter.
This link includes some application notes.
https://www.syscompdesign.com/application-notes/
https://www.syscompdesign.com/
Max.

 

Recently my old Tektronix 432 gave up the ghost

Lately, I've been doing my projects on the coffee table because I have more room than on my bench.

My "portable" scope was a Tek 466 until it stopped working. I haven't gotten around to troubleshooting, so my current go to scope is an SC502 (15MHz). If I need something faster, I move my project to one of the 7704A's.