Google AdSense usually works, but there are also many ad networks that pay with bitcoin.
Your can also sell ad space to people who want to advertise their own referrals.
I understand you want to make money out of this and that you don't really care what people want, but you might get 0 traffic. I feel like there's more than enough faucets and no desire for more. Feel free to prove me wrong.
As for your question, I don't think 1BTC is enough. I have seen very active faucets run with 10+ BTC.
I am asking for initial budget required,as the faucet grows,more budget can be invested