Here are a couple of other ways you might possibly be able to make a little extra money from your Twitter account.
-Check out a service called MyLikes
-Check out a service called SponsoredTweets
In this regard look to every paid Tweeting site and see what ones work best for you. I have used both of the above and made money both while they were pretty simple to use.
Also look at a site like Fiverr. Put up a gig based on advertising others products through your Twitter. First look at what other Twitter ghigs are doing before creating yours. Try to follow there lead but make your a little better or unique in some way.
You can also sell the account on one of the many internet marketing forums with a marketplace.
I would also work on increasing your fan base as 35,000 is really not all that huge unless they are super niche oriented, engaged and highly convertible. Best of luck and you should be able to pick up some extra coin somewhere.