[www.TravelKind.com]

I have a travel forum and have been earning a few bucks with adsense. Would it be better to try and expand my current website or perhaps start another ten and ad adsense to them? It seems like I would have a better chance having 10 websites with adsense instead of just one. If I started the other ten websites could I put a link to each of my other sites or do the search engines look down on this? Thanks for your input.