We're saving up the cash for home remodels.
Our house is old-ish (it's a few years older than me), and needs a lot of updating. However, the only pressing thing we had (that dh did for a total of $100) was redo some stuff in the master bathroom. The floor was rotting through because the previous owners never changed the wax seal on the toilet. Luckily it didn't hit the subfloor, but still.
Everything else we want to do is mostly for our own pleasure... like redo the entire kitchen because half the cupboards are made out of particle board

: and it's not laid out for anything resembling a cook; put in wood or hard floors because I'm somewhat allergic to our shag; a small deck out back because the stairs are horrible; dh put new shelving in the pantry so it's easier to use (and prettier!); adding a bunch more raised beds to the garden area, that kind of thing. The only super-pressing needs we've encountered though were the water heater dying and the garage door busting (both of which we put on credit cards with 0-3.99% - now we do better).
But, we bought this house with the idea that we'd grow into it and wouldn't *have* to move or add on in the future (because we're lazy that way I suppose). So while I wouldn't mind kicking out the dining room/kitchen wall out a few feet to make things easier to move around, we're not going to.
So just figure out what kind of payment (cash or loan) you'd feel most comfortable with. We're still struggling with the student loan monster after finally paying off all the credit cards, and are adamant about not doing a HELOC (the first mortgage is plenty for us), so owing more money to someone else isn't an option for dh and I. And can you add up how much your energy-draining house is actually costing you? If I can put actual numbers in front of dh and I it makes things easier to decide.
For example, we don't heat with electricity or gas because of this. If we heated with our sucky electric baseboard heaters, we'd be paying $200-$300/mo to keep the house liveable. Since we heat with wood, we pay $70-$100/mo (plus we put aside $20/mo for wood cutting supplies) and the house is nice and toasty (74-86 degrees F). Because of those numbers and the fact we could deduct the cost of the wood stove from our taxes (I love where we live!), it was a no-brainer for us. Although I'm still not pleased with the fact that the stoves went on a cc as well... *sigh*