Good Stoves anywhere from $2000-5000 depending on size, feature and what not. I would choose a Harman stove as those are workhorses, parts are available for servicing. I have a 10+ year old Harman Advance that just needed cleaning so far. Little graphite powder when it gets squeaky. I built my own hearth pad with Durock fireproof backer and ceramic tile for under $100. Exhaust can be 300-600 depending on your set-up. If you pay a company to do it, I think the tax credit covers more than just the stove. Call your local dealer and get a sense of what they are charging. Try to call at least 3 places. I found 2 local ones that were “gougy” when I was doing my research.