Yeah my house is 23 years old and it loses heat (or cool) fast, I've had the idea of "why not just drill a hole between each stud and fill up the space with foam"? before.
Also, Bison, just because you have plenty of money doesn't mean you can't cut some frivolous things to save money. I'm not gonna compare wallets or bank accounts, and even if I had millions of dollars I'd still be willing to save a buck if it made sense. Not that I don't agree with you, don't think that, I do, far too many people have approached their house as if it were an ATM and bought not just all they could afford but FAR more, screw those idiots, let them fail, it's not like they don't deserve it.
5 years ago when I bought my house I budgeted and bought -half- the house I could afford. Sure I coulda bought a $350K or 400K McMansion but I bought a nice 145K house with "potential" since then I've paid it down to under 110K owed, added a pond, a 12x24 workshed, finished the basement out adding a theater and toilet, logged the trees out and added about an acre and half of grass, upgraded the central unit, replaced the roof. And my mortgage is still around a grand a month and easy to pay.
I also traded off my wife's 05 Yukon because it was too big and we didn't need it. Sure I coulda bought her most any car I wanted her to have, from low end Kia to high end Mercedes but I got her the HHR SS, enough room to make us all happy, enough performance to make me happy, it has Onstar which makes her happy and when I was done dickering we got it for 21K and they gave us 17K for our gas guzzling SUV.
What I'm saying is, I don't feel ashamed for being somewhat "thrifty" even though I don't "have" to be, I just feel like I SHOULD be.
I cut my cable bill because I was paying for a lot of premium channels I never watched, and for phone services I never used, when I cut it down to what I needed, and used, I qualified for a promotional $129 a month plan, plus the HD and HD PVR add on. Just as an example.
Guess what I'm saying is, regardless of how well you planned, why pay for things you don't really need or use or can do yourself (coffee/drinks/etc) cheaper. Plus it's sometimes just kinda fun knowing you just saved $xx dollars on something