signal

I'd like to build a web app (with help) with hopes of it becoming a FB and mobile app in the long run.

The structure is basically HotorNot/FaceMash to start. That will be the minimum functionality. From there I'd like to improve it and add the features that will actually make it wicked fun but at the very least a HotorNot that people can contribute to is the immediate goal.

Is it a waste of time to build that into Wordpress to use all of the user, db and registration framework but have to build a plugin for the whole purpose of the site?

Would it be better as a dead simple app built from scratch on a more modern framework?

Should I go with PHP so I can get cheap coding help or man up and learn a big boy language so I can finish it myself in 10 years or go broke trying?

Thanks for reading =)

UPDATE: Thanks for the wicked response, it's great to be able to 'talk' this out with the HN crowd!