Beginners cash sounds like a nice idea but wouldnt work; firstly as Kinboshi says how do you track beginners in cash, secondly, how is the house going to get the correct amount of players at one time to fill the table. Finally, judging by a lot of comments from beginners they are just not rolled to play cash at a level that would suit the house.
50p 50p keeps the pros off cos it too small maybe pay sessions on this game rather than rake?