Thanks for the link. It looked good at first and then I started peeling back the onion. Here's the manufacturer's link they provided:
https://www.tyconsystems.com/rppl1248-36-35I saw they couched that the solar may not work all the time in northern winters. So...they have a 35 watt solar panel. Hmmm.
Next they have a 36 amp hour battery to support the system. They keep everything DC voltage.
So, what I have been looking at are panels with solar generators and then an off-the-shelf outdoor mesh/access point system. This link shows a 80 amp hour and 100 watt panel that converts to AC for $300
https://www.amazon.com/Enginstar-Portable-Power-Station-Solar/dp/B093T7T7ZQ which is 3X the solar panel and 2X the battery.
Here's the mesh/access point I'm looking into at $140
https://www.amazon.com/Ubiquiti-Networks-UAP-AC-M-US-Wide-Area-Dual-Band/dp/B076B4ZVF2/ref=sr_1_3?keywords=mesh+access+point&qid=1660486104&sr=8-3 . Of course now I'd need a suitable enclosure and a POE for about $25 to make this work. All in all it's a bit cheaper and more capable getting the individual components but you gotta put it all together so it's not as slick as buying one that you can just stick in the ground. Plus with the do-it-yourself you have an AC source available which I plan to utilize with a GMRS radio sitting in a charger in the enclosure for emergency coms.
However...800 yards is pretty dang good and that may settle it. I only get about 300 yards straight out and 175 yards to the side with the access points I use now
https://www.amazon.com/TP-LINK-EAP110-Outdoor-Wireless-Installation-Controller/dp/B07RTYZ9ZG/ref=sr_1_14?crid=3AGFPO7Q8TB8J&keywords=tp+link+access+point&qid=1660486530&refinements=p_36%3A1253504011&rnid=386442011&s=electronics&sprefix=tp+link+access+point%2Caps%2C73&sr=1-14 . I'm going to go ahead with the Ubiquiti access point above for the other side of the house and see how it works. If I don't get near that 800 yard mark the choice won't be too hard. I need that kind of range to cover the property with 4 remotes....400 yards would mean dead spots or employing 6-8 units...quite a cost difference.
As an aside, right now I'm using a Ubiquiti nanobeam Gen 2 bridge to bring the fiber optic internet from one house to the other. It's been working flawlessly for over a year and a half now. For the first year it was satellite internet...which is poor at best. Now it's hooked to the fiber optic internet. I have never had to reboot or reprogram or power down and up to keep the nanobeam bridge online and it's always had super quality performance. It's good for I think 450 mbs which is faster than the 100 mbs service I have. I'm running a router and an access point at the remote house and we watch a couple of prime shows simultaneously and surf the net with no problems.