Sketchup is good enough for projects like these. It's a little awkward because it doesn't have the concept of a body, only faces. But that's only relevant if

Sketchup is good enough for projects like these. It's a little awkward because it doesn't have the concept of a body, only faces. But that's only relevant if you're doing simulations on the design. The biggest issue is that the web version is lacking but the desktop version hasn't been updated in like a decade. So be sure to have a shortcut list handy on another screen because you have to use shortcuts if you're going to be remotely productive.