best thing for you and your girlfriend? go and get yourself a used digicam and vidcam and start shooting pics and vids from you and your girlfriend - that will give pretty hot content for starting a small amateur paysite. once you got your small paysite up start trading on your friendspages with other amateur sites; this will drive you some nice money in for something you anyway love to do...I assume
then you can start making freesites and galleries with the content you have - that will get you more and more traffic to your paysite what means more money for you and your girlfriend
and maybe one day you can live from it