I've followed your builds I've run across here on expo and can say that your attention to detail is admirable (something I've had to set aside with three boys and a wife that can't remember where she put her keys).
I also saw your other post on a new Powerwagon and was put off by all those that seem to know best so I would say if your able to do it, and given your way of travel, do it. Get whatever you want today and sell it tomorrow; that's part of the learning process and fun. While that's an expensive way to live, it seems like a pretty tame vice compared to others. You've educated yourself on pros and cons and seem to have your better half's buy-in so why not? Those like me will live vicariously through your builds!
For me, there a lot of vehicles I would love to have and the grass is always greener on the other side. However, why not a diesel 3/4 Ram with a similar build out to the AEV/Nomad build by DPP (great video on YouTube)? Seems to check all your boxes (space, power, comfort, towing, off-road ability, etc.). You could offset some of the cost buy finding a lightly used Ram and then start the fun! If you can swing it, keep the 4runner until its finished.
So I didn't vote. It's your decision and I think you already have decided. Whatever it is, have fun and if you share, I'll be watching.
Thanks for the kind words, much appreciated. One of these days I'll keep something around long enough to do a truly amazing build and do the platform justice. The longest I ever kept a vehicle was 8 years, that was a 1998 Jeep Wrangler Sahara I had up on 38's with 60's, it was my vehicle in college and my play toy after I graduated. The only reason it didn't stick around longer was because it got totaled out when an unlicensed, illegal alien driving someone else's vehicle that she didn't have permission to use, rear-ended me in Dallas and then attempted to flee the scene even after her three old child had flown into the windshield. It sat around at a body shop in limbo for nearly five months while insurances fought it out and ultimately they totaled it out.
I am holding out for news on the HighBoy, if it doesn't debut at an auto show by next January I will more than likely move forward with a diesel Ram or Ford. Until then I just have to cool my jets when it comes to modifying the 4Runner.