It is a good idea, obviously location is going to dictate numbers and I would suggest that London makes the event a whole lot more expensive digs wise for people (but Luton is a good G with a cheap lodge nearby)
The other point, that I have tried to make in the private games on a Friday, HiLo games should be limit, the nature of Omaha and the split pot doesn't lend itself to pot limit that is just for high really. The pot limit hilo played last Friday was just bingo I not sure if the (real) WSOP do this game but I'm pretty sure they are mostly limit. Maybe this should be looked at or even a mixed limit game for the stud enthusiasts.
Whatever G if the dates are right I'll be there and play both
