@BelluciNathaniel There are quite a few options out there, even for sliding gates, so there should be no issue. I'll leave you some sources if that helps. I don't have a gate opener, but I do have a garage opener, and I'd suggest you go for Liftmaster as a brand, I got from them and I'm more than satisfied. When it comes to installation, if you don't trust yourself to do it, call in a professional so you don't accidentally damage it or do who knows what.
https://www.optimainstitute.com/garage/automatic-gate-openers.html
https://www.fixr.com/costs/electric-gate-install#automatic-gate-opener-cost

I'm gonna ask a few friends, maybe I could share some useful info if that's the case.

The money you spend and the effort you put in assembling the system just ain't worth it, in my opinion. You could just get a CO2 detector and end it. My father-in-law installed a Nest and he's satisfied, and I have friends with kids who have directly installed other systems without any hassle. I am looking to get one too, but I'm looking for a cheaper option. I did some research and found a few options within my budget here - https://popular.reviews/smoke-carbon-monoxide-detector/. I hope this helps, good luck with your project if you move on with it though, mate!

@secantscope The membrane in the picture looks more than fine for your project, I'd go with it if I were you.

As long as you provide ventilation, epoxy is your go-to. It's a good idea, go with it!

@timmy If you are referring to the Google assistant, you need to open the app, tap the compass icon in the Explore section, enter Settings, scroll to Services, tap Home Control, and scroll until you find the selection for your lights. But I'm not even sure what you are talking about, I might be giving you the wrong directions here.

Has your issue been resolved? I'm interested as I'm in a similar situation at the moment.