Fastest/Best way to build a roll for the upper-mid to high stakes

Feel kindof stupid asking this, but what's the best way to build a roll to properly play the 30/60 you guys keep taking about?

I play lower stakes, am comfortable playing 10/20...

The investment for just 200 Big Bets is $12,000! This, to me, is just too much money to go and deposit into a site...
The obvious answer is then to deposit less and build it up - yea I know...but how much and where's the best place/how's the best way to go about building the roll...
Assuming I could beat that limit for a profit/would enjoy playing that high regularly...

Isn't 30/60 full of pros?

Any advice/insights into how you may have built your roll appreciated.
(I tend to get greedy and cash-out my winnings and spend them, so I find it very tough to be able to
accomplish this task of amsassing a $12-18K roll).

Joe M.

Ps. If you think this post is funny or you think I'm a donk or idiot or whatever - fell free to insult. I am here for your entertainment.