Approximately how long does it take to make %50 profit and cashout? Is it something like 1 year? A normal investment make about %10 per year so it takes about 4 years to make %50. But these are bitcoins so you can't know what will happen in that 4 years or even 1 year. And also as this is a new site, and not much trusted, we can't know what will happen to your site in 1 year. In my opinion you should lower the %50 if it approxiamately takes more than 3 months or so.
the time it will take will depend on the tickets volume and also how much are the total invest by all users, so we can't guarantee the time. But you don't need to wait to receive all your investment plus the 50% to cashout, everytime a ticket is bought the profit will be devided by the house and the investors, and your account will be credited every top of the clock.
is it clear?