Actually you need SU2014 or newer.
I think you just have to face the fact that at some point, your old software isn’t going to be supported.
There is no reason to update hardware for each version of SketchUp. Not sure where you got the idea that would be necessary. Operating systems change, equipment changes and it’s a fact of dealing with computers that once in awhile you will need to upgrade to remain current. This isn’t unique to SketchUp.