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Some people would pay slightly more for a house that already has solar installed, even if it’s a 5-7 year old system. So install it, then use it as a selling point down the track.
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Anecdotally, I’ve rented a house before that had solar installed. It was a factor in my choosing to rent that place. I don’t know how it is elsewhere in the world, but it’s pretty common in Australia to have to pay for your own electricity usage when renting a place. The solar panels lowered my bills considerably.
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Pad mount / ground mount systems are a thing, if you have enough space. That said, anything that can be installed, can be removed. Cost is a factor, though.
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I don’t see any breakthroughs coming any time soon. Gradual improvements through economies of scale will likely be it, along with any government incentives.

I know you have history with Lems, but I was very happy with mine!
They were incredibly comfortable to me for all day wear, it was strange to take off boots after a long day and not feel relief. I wouldn’t mind a bit more width, but these are the widest boot or shoe I’ve worn apart from some EEE dress shoes. If I ever have to buy them again, I might go up half a size.
The only time they slipped was during a pretty step descent, with compacted, melting snow on top of very loose, fine material. I can’t imagine any “normal” boot or shoe faring much better in that scenario without crampons. I was required to wear crampons for any serious ice walking, unfortunately the tour guides wouldn’t let me get very far without them.
The waterproofing was decent. Rinsed off mud and dust in running creeks and rivers many times without any ingress. I think the only time any water made its way inside the boots was through the top when I was soaked to the bone. I pulled out the insoles, patted the inside of the boots dry with some paper towel, and they were completely dry by morning.
They were warm enough for me, though I didn’t experience any extreme temperatures.
Again, I don’t think they’ll be BIFL, but for comfort, width, waterproofing, and a relatively plain look, I don’t know of any other boot I would prefer at any price point.
There are Canadian stockists, so you shouldn’t have a repeat of the last ordeal. I bought mine from an Australian stockist because I couldn’t imagine dealing with international returns.