Hello! I would also recommend underfloor heating. Whether you want a [Kachelofen] also depends on personal taste. - I personally find it very romantic and cozy!
Heating with wood is certainly cheaper, although one should consider whether they are physically able to carry the wood to the stove. -My parents, for example, live on the 3rd floor and I think, when you get older, it is quite tough with the wood without an elevator