3500 sq.ft. on a single floor is quite a sprawling floor plan. Are you including garage and unfinished or basement space, in that number?
I’m outside Philly as well, and went with two wood stoves, to heat a similarly sprawling (but also multi-story) floor plan. One stove at each end of the house, overlapped with six zones on an oil-fired boiler, to manage temperature throughout the house. It works great, despite some non-ideal characteristics of the house (it’s old).
I grew up in a house with several open fireplaces, and this house had two large cooking fireplaces already populated with a wood stove in one and a gas insert in the other, when I bought it. My plan was to tear them out, to get back to the ambience of a large open fireplaces, before my wife convinced me to just give the wood stove a try.
That lead me here, and to the realization that I could have my pyro fun while simultaneously saving several thousand dollars per year on my heating costs. Fast forward a year, and I had torn the gas insert out of the other large fireplace, and now run two wood stoves all winter.
There are many great things about this setup, but I won’t bore you with them all at once here, there is plenty to read already. In our case, we have an open fireplace on our back patio, and that’s purely for ambience. If you can swing the expense, I’d highly recommend this. We also have a large stone fire ring in the back yard, which I use primarily for burning yard waste and splitter swarf, but is also great for camp fires with the kid and roasting marshmallows. So, you can have your stoves in the house, and your ambience in the back yard... if cost is not an issue.