I'm not sure from your reply if you understood, that I meant an add-on wood furnace (hot air) and not a boiler (hot water).
You have to remember that based on posts so far, we know next to nothing about all your current system, or situation re. what you might be able to put where.
As already hinted at - if you don't have a whole winters worth of wood already seasoned and ready to go, you are really behind a rather huge 8-ball for this coming winter.
To be clear, maple1, our current furnace is a 21 years old forced air oil guzzler that has already required 2 service calls this fall. I want therefore to switch it out after the winter (that seems to have started today) but also our insurance has called for its replacement as well and are very assertive that the tank must go next spring. I could probably fight them for another year for the furnace but not the tank (and they were the only insurer who would grant me the tank for this year) but why bother for something so old and unreliable. Meanwhile there are also issues with the duct work and so it begs the question of what next. So many possibilities. I've just been reading about biomass gasification which I hadn't even heard of and there is probably plenty of relatively free biomass to be had from this property and the local environs. As to moving the heat in the house, despite the duct issues its probably still cheaper to stay with forced air, and as you say, in that case easier to incorporate a wood-burning indoor furnace with the propane. Moving to radiant fluid heat would have some real benefits in terms of comfort and experimenting with in-floor heat, and as I mentioned above compost heating. I understand there is at least one dual propane/gas and wood boiler out there but I'm still doing that research, and its not for this year anyway.
All this is to say, in the short term I think I'm still looking for freestanding wood heat. I won't be committing to anything though until I can nail down enough wood to get me through the winter. I'll have to buy it this year for sure and possibly next. I'm more than a year too late to generate my own. It'll be a crunch to process the wood I've already cut for next autumn/winter.
But taking into account all that I've gathered so far, and given the questionability of my wood for the next couple of years, I probably need to be staying away from stoves with cats.