C4d is a fairly top-end modeller and renderer. Hexagon is more limited but at a cheaper price. Vue and carrara are more landscaping generators, and do it very well. You wont waste time learning to model in Hexagon, you may need some time to learn what the tools in a new software do .

Booleans can cause problems in meshes, because you get some strange polygons unless you take a lot of time with alignments. After you do a boolean remember to merge points , and cleanup the mesh.   If you are using booleans to drill holes , it can be better to split up the mesh so each hole goes through only 1 or two polygons . Drilling lots of holes in a disk will give you a nasty mess in most modellers. It will look fine in tyhe modeller but export it as an obj and thats where it gets fun.