Frequent readers know that I'm a big fan of the Prusa line of printers, especially the MK3 product. I've assisted the local makerspace assembling a MK2s many moons ago. It wasn't particularly difficult, as the documentation in paper form and online is excellent. The MK3 will be even easier to build. A fellow makerspace member purchased the MK3 and described the assembly. In a group build, it takes longer than in a solo build, primarily because it's a learning/question/answer experience as well as a too-many-cooks experience.

Prusa recently released an updated version of the slicer and it's even more amazing than it was. So many features, but very well done from a user interface standpoint (opinion).

I think you're picking the right stuff so far.