Thats not huge amount, I consider it as a small amount because betterbets has around 20,000 btc wagered in 6 months+
You're right, but it's not small too in my opinion.
Depends on what you will be coding , if it is just another dice site with nothing special than the others then you can expect that no one will play there. Owning a dice site is a huge thing and it is not for everyone to have
I guess I can't offer anything different than other sites. I'm thinking about hiring a good designer. The site I will be coding will be interactive and "alive" with features like chat and small faucet. Also heavy advertising (like PrimeDice). But I'm just researching this sector.
Thanks for your opinion, valuable for me.