I have done both in small areas. Traditional hardwood floors, installed with a nailing device into a normal subfloor, is not really any more difficult than tiling the same area. There are some tricks -- mostly how to make sure that the pattern is SQUARE to itself and adjacent rooms (this is assuming that there are imperfections in the framing of the room that you need to compensate for...) and you need to understand how to fit in the finish pieces (by ripping down regular planks and maybe routing or back sawing them) but if you can rent the right tools and GO SLOW so that you do not make mistakes you can get a decent result.
Hardwood Floor Installation | Ask the Builder You need to get access to high quality floor finish too, and that is probably the hardest part -- need license from the EPA for the "good stuff"...
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