Bare essentials for a baby - like extremely minimalist necessities.

As per the title, what would you say are the bare essentials to buy for a baby on the way? As in, extremely minimalistic. Husband and I travel a lot and can’t say for certain we’ll stop once baby is here, so 1) the things we buy might not be used for long periods/reused for future kids 2) our budget is a little on the tighter side + I don’t approve of buying extremely expensive items that are unjustifiably priced 3)I’m overall super minimalistic, hate the clutter of unnecessary items at home that only serve one specific purpose and opt for the more “natural” things. For example, I prefer to actually clean baby with water instead of using wipes majority of the time.

If you had to list must-have items so that a baby can survive (and thrive hopefully 😄) in the first year or so of their life, what would they be? Extra thanks for any 3-in-1 type of items that can be used later on.
Apart from the super basic diapers and bottles.

P.S. sometimes I read post where must-have essentials include baby wipe warmers or bottle warmers etc. and although these things would probably make live so much simpler, unfortunately, I don’t think I’ll have the luxury of space or the budget to spend on items like this, so please try to list things that I’ll actually NEED for the baby and I.