Thanks, everyone. Appreciate all the perspective and first hand experiences of what you are all seeing..
The motivating factor for us is privacy. We don't have any, having built very early in this phase of our current sub without houses (at the time) on either lot next to us. BIG MISTAKE. Both lots got bought up by builders for their personal homes. One of them built a 5,500+ (!!) sq ft house that takes up literally every square inch of buildable space on his lot. (We're a couple thousand sq ft smaller..) And here's the best part - it extends pretty much into my backyard since the street curves. So, I look out my great room window - and look at the side of his house. Great...we put in some huge trees to try to hide everything. Mistake #2 - some of them are Bradford Pears, and now that they're 20+ years old, they're super susceptible to wind and rain, and we already lost part of one. The others are a kind of evergreen that are known (not that we knew it at the time) to not be "permanent" trees and that we can now see through as they are disease prone, deer prone and are turning into more a big structure of sticks than a full, healthy evergreen. But the pears are 30+ feet tall, the evergreens 40+ feet tall and there's no replacing them for the screening we DO have left at any price. You just can't BUY trees that big - I've checked..best I can get [and even this is 'hard'] are ~20 foot evergreens, which won't hide his house. So, if we were to "fix" (replace) them with new - I'd be looking at Mr 5,500+ sq ft all day long for the next 10 years. Not an option..
The new property is 3.5 wooded acres, at the end of a court. We'd finally have privacy. But - we made a "why vs. why not" (go ahead with it) list and came up with *27* "why nots". (No nearby hospitals..limited recreation..increased taxes..site condo with extremely restrictive master deed and bylaws..water quality [iron & arsenic]..high HOA / Condo fees..the list goes on..and on).
The "why" list has a grand total of 7 things on it (vs 27 why not). But the privacy issue is worth roughly 50 why nots. So there's that.
It's tough being in ER and having no W-2 paychecks to fund all this. Had I been smarter (or able to not have to bail from the J*B due to unmanageable stress that was likely to kill me had I stayed), I would have built the retirement house BEFORE pulling the ER trigger.
Live and learn, but it's really surprising to see what new construction costs nowadays. We thought things were crazy when we built this house (albeit, in a tract sub) at ~$167/sq ft INCLUDING land 20 or so years ago..