Embarking on a home remodeling project brings excitement and lots of anxiety related to decisions that you have to make without much context e.g. should we use a 2×4 or 2×6 stud.
Links below help de-mystify some of this, so your home remodeling project is more enjoyable.
The cost impact of using a 2×4 vs 2×6 in a house remodel project affects structural strength, comfort (from insulation) and of course cost. Based on your goals and budget, you have options.
TLDR; Both are structurally sound, but 2×6 gives better insulation and comfort.
For more details, read https://elementshomebuilder.com/cost-to-build-house-2×4-versus-2×6-walls/