How to automatically post from a page, to a page?

I'm stumped on this one.

I have a real world business which I have a facebook for. There is a local page for my area where people and businesses can advertise things and services. There are over 16k members, and a LOT get's posted all the time. I would like to be able to post my short ad on that page's wall just like once every few hours or so.

I have tried using facebook mobile texts, doesn't work for some reason.

This is on the same account as my personal account, so using a bot doesn't work that well, unless it can change from personal to my page, and that part is pretty damn buggy anyway.

Is there any facebook app that allows posting on another page's wall?

If not, how can I do this?!

Yes an app can post on page's wall. And you can set cron job for automating it. Hire a coder to make the app

I guess ill just code this myself. :/