Read before you proceed; Also ask Eliot Jacobson
Read up on the patents and patent infringement cases to get a sense of what areas of multiple bj has been protected by patents, and if you are not sure then I recommend hiring an "legal" expert who is versed in patents. All I can say is that language used in patent isn't plain English.
I have some insights about hiring a math expert to do the EV analysis, which ought to cost you from $3,000 to $5,000. I read long while ago that Eliot Jacobson may be available to do the math.
Good luck.
PS I have a multi-line BJ game patented -- it was supposed to be called "Million Dollar BJ" but it's hard to sell the concept to game manufacturers. The name is derived from the top prize, which is $1,000,000. The game is a multi-line SD video BJ game, one of my many ideas within my master concept.