Bob, I think your making it too hard, trying to put together equipment that fights your objective. EAA (Electronically Assisted Astronomy), at it simplist, works well with a basic astro high frame rate camera like the ASI294 (not the expensive cooled model, the uncooled one is fine for EAA), this will connect straight to a basic laptop running Sharpcap imaging software (which will handle video frame stacking and alignment for you). This will be displayed on your laptop screen but obviously you can throw it to a big screen if you like.
You will get the ability to save the stacked image.
Your Dob, despite being Goto, is not going to track like an Equitorial mount, so there will be limitations to how long you can build video frames, but you will still have an image to display that you can talk about. Perhaps poking it back onto your target might extend frame build time, within the alignment limits of Sharpcap. If your using a sensitive astro camera it's possible to build a nice image pretty quickly.
You do not mention which ASI camera you have, but it is possible it would work fine if it has video frame capability. So all you might need is a cheap Windows laptop and Sharpcap software.
Plenty to read about this subject over on the US Cloudy Nights Forum, in the EAA sub forum.
https://www.cloudynights.com/forum/7...astronomy-eaa/