Questions about running ads.

[cartooner]

I would like to run ads on my forum...probably on my sites VBadvanced's CMS. The CMS would be the entry way into the forum. But I have questions..

My site has adult content and I am not sure if Google or companies like them would allow ads, even if it's not actually on the forum itself but on the sign in page. Has anyone had experience with Google and adult content??

If I would find a Ads Company that would allow adult content then I might run an ad on the forum itself.

Does anyone know of ad companies that allow adult content on a forum.
What is a good Mod for setting up ads on Vbulletin. I see Redtyger's and it looks good, but it seems like quite a bit to it. But I can't judge until I try it..

It's hard keeping up with the expenses without running some ad/ads....and I need advice.

Thank You.