What is amazing to me is the perceptions on the house size. We live in one that is ~1,700 sf and when we moved in compared to the old house we felt we were rattling around like a couple of bbs in a box car. But there are only two of us so we're not exactly tripping over each other.
One of the options was an intercom system, which I scoffed at. But DW thought I was ignoring her if she was yelling her head off from the master bedroom and I couldn't hear her in the basement (and my hearing is fine, thank you ladies).
As far as the money goes, there are many who would be ecstatic to be in your position and are happily retired on a lot less.
Pull the plug and do it.
And if you end up looking for something more to do, as I did, you always have the option of working again, but with your KMA* hat firmly in place.
*Kiss My A--
I heard the call to do nothing. So I answered it.