If you only need to run one application and no Mac equivalent is available when you move to Apple Silicon, you should look at Crossover as a possible solution - it lets you run Windows applications directly on macOS, and works by emulating the Windows API (instead of running a copy of Windows in a virtual machine). You would need to use the free trial to see how well your particular application works, or at least check if they have mentioned the application you use in their compatibility list.
I used Crossover briefly a few years ago but my needs for actual Windows were complex and varied enough that I found it easier to stick with the VM solution (or a real PC). Your Windows usage pattern sounds much simpler.
