Eaton are probably the best out there. In my experience battery last between 3 and 4 years.

An new AMD Laptop APU will outperform Intel in every metric. I can only recommend T14 & T14S but any other Thinkpad will be ok.

I’m very skeptical of anything Toyota says about EVs.

Toyota Rav4 PHEV 18.1kWh Toyota Rav4 Hybrid ~1.6kWh Model Y LR 81kWh

81 / 18.1 = 4.48 PHEV 81 / 1.6 = 50.6 Hybrids

I shorted TSLA once and got burned. Tesla stock fan base can keep pumping the stock up for longer than you can hold your puts.

Anything other than QNAP.

Eaton is my recommendation. Look at the 5S1500 (modified sinewave) or 5SC1500. They all work with NUT. I have one of my UPS connected to a Raspberry PI Zero with NUT. And my servers NUT clients are scheduled to shutdown after a 2min outage and my NAS after 4min. I can also monitor the UPS from Home Assistant and receive notifications on my phone each time the UPS goes OB or OL.

https://www.eaton.com/content/dam/eaton/products/backup-power-ups-surge-it-power-distribution/backup-power-ups/eaton-5-series-ups-brochure-br153013en-lr.pdf

Any specific reason to move from a Mikrotik to OPNsense?

I think this is the best homelab router out there. If you are new to Mikrotik there is definitely a steep learning curve.

Openwrt is fairly good too, but I think documentation can be lacking and confusing for some edge applications. My other concerns with openwrt is performance since it is compatible with a wide variety of hardware is difficult to know how it will perform without testing it.

Can you share the link for that case?