I'm not even sure it's possible to acquire hardware on which to compile and test a demanding game and not have a 64 bit Dev toolchain, without going to extra

I'm not even sure it's possible to acquire hardware on which to compile and test a demanding game and not have a 64 bit Dev toolchain, without going to extra effort just to avoid 64bit for what purpose? A trivial performance improvement for an app that is resource intensive while also not needing 4gb Memory?