"lowest unique bid auction"
This may not work especially if we're aiming to operate and compete with the other casinos.(international)(you know how paranoid people are here)
Or is this mainly aimed at Filipinos? Another thing is the "No Limits", that's quite risky for the investors so there should always be a set max bet amount or maybe a certain percentage of the bankroll. The one I'm currently working with has 2.5% of the bankroll as the max bet amount (even though their bankroll isn't small @ 600+BTC,it's a good way to reassure investors and as well as protection against whales/bankruptcy).
That's about how much I spent for 64blocks.com and it took about 6 months working with him. The concept is simple. All the problems with running the site ... not so simple.
Yep. 20 BTC isn't gonna work, especially with the recent spate of DDoS attacks. Cloudfare for casinos could get really pricey. (around $1k-4k)
*On a side note, have you thought about adding a game like "e-bingo"? It's a popular game among Filipinos. Plus, it's got a pretty high House Edge at around 11 - 30% I think. Take a look at this https://www.betmotion.com/en/video-bingo.aspx .