How do I monetize my website and internet business?

Hello all,

I currently have an internet business that is only making hobby money right now. I would really love some advice on how to ramp up the earnings and turn it into a full time income.

Here's some background on my internet business,
My site is Pigeon Racing and Racing Pigeon Secrets | The Pigeon Insider and Pigeon Racing and Racing Pigeon Secrets | The Pigeon Insider

The niche I am in is pigeon racing yes you read that right... pigeon racing. and my site has become somewhat of an authority in the niche. I currently hold first page search engine placement for many of my main keywords including my seed keyword "pigeon racing".

I currently get on average 10 new subscribers per day to my mailing list (I'm sure thats not alot in IM standards but we're talking about pigeon racing here lol). And I have alittle over 4,000 subscribers on my list.

The site gets on average 2,500 views per day.

I created three clickbank products which are currently the only method of monetization on the site, and I am selling on average 1 to 2 ebooks per day. You can see the products below,

Pigeon Racing Formula

Champion Pigeon Breeding Revealed

Pigeon Racing Nutrition Secrets Exposed

I was thinking of turning the site into a membership site and charging a monthly membership fee to view the content. However I am not sure how the visitors will react to this considering high costs are one of the problems in the pigeon racing hobby and sport.

I was also thinking of doing like magazines do and charging for ad placements, but I have no idea how to go about that.

There really are no affiliate products or offers that I can promote for this niche, thats why I created my own products.

So if anyone has any ideas or tips for me I would really appreciate it.

Thanks so much in advance,
-Chris