Yes and no. This courses focuses heavily on the use of the Hard Ops/Boxcutter addons for efficient modeling. You could theoretically do it in vanilla, but we would heavily advise against it. The other addons like Decal Machine and Mesh Machine are not required, but recommended for detailing and mesh fixing.

Just under 50 hours.

2 designs. One from Josh Gambrell, and one from Ponte Ryuurui.

It depends on how beginner you are. This course assumes some experience with the hard-surface modeling workflow, and a general understanding of common techniques and issues such as booleans, bevels, shading, artifacts, and why these things are important. If you are weak in these areas, we'd suggest taking our SciFi Crate Design or SciFi Weapon Design in Blender courses, both of which are available on this Blender Market account.