In my mind there's a big difference between costs caused by things that would be hard for you to do (build and support a reliable cross-compiling Obj-C developm

In my mind there's a big difference between costs caused by things that would be hard for you to do (build and support a reliable cross-compiling Obj-C development environment on Windows) and costs caused by things that are easy for you to not do (SDK charges). The former I'll overlook even if they are two and a half times as much as the latter. ($500 second hand mac mini every two years vs $100/yr.)