Electric is the best route for aerial video, but it's very expensive. If you have a small budget, you're asking the wrong questions

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Alot of companies that do professional aerial and video photograpy use large .90 size (or bigger) electrics. They average about $3000 in cost.
Something more inbetween that should get the job done is, as was stated, a Logo 20. Which will probably cost you around $1500 (or more, depending on the setup).
Like charlie said, the helicopter has to be relative to what you want to lift.