I was totally going to design something like this as I recently trimmed my bumper. Still may as I have a few ideas I want to try but similar concept of using thick ALU and supporting from the front slide and bumper bar. Just gotta wait for the snow and ice to melt in my driveway before I roll around under the GX to take measurements.
I'm interested to see how it comes out but know from experience that Version 1 could often use a design tweak or two. If you don't get 10 people to commit, consider biting the bullet on having 1 made (I know it's expensive), refine the design, and you'll have some documentation to show the next 10 people how it looks and functions.
If you haven't already, try quoting this at
SendCutSend as they have by far the best pricing I've found for smaller sheetmetal components like this.
I've been using Autodesk Fusion 360 for my home needs and it took a little getting used to but I really like it now. They have a personal version that allows up to 10 parts to be active at once, but it's not for commercial use, i.e. you can't sell what you design.
It's licensed in a subscription model like almost everything these days and I went ahead and purchased a 1 year subscription for $340 when they had a 50% off sale. Not cheap but compared to SolidWorks, it's a bargain. Compared to the Siemens NX and ANSYS licenses that I use at work, Fusion is basically free.
I'll give you that SolidWorks is the most intuitive of the old guard, but the best? It depends on your use case.
We exclusively used SolidWorks at work for more than a decade but found that it was downright atrocious with large, complex assemblies. Once we started getting to 100's and 1000's to >10,000 parts in a top level machine assembly, and lots of sheetmetal components, rebuild times and crashes became intolerable. Some of their mitigations such as lightweight parts, Large Assembly Mode, and Large Design Review can help, but design the same thing in NX and you'll wonder why SolidWorks in 2025 is still such a dog.