I personally think that the reg free should stay, its a major thing that differentiates APAT from the norm, and is one of the things that appear top of my list during my "APAT is great because" speeches when telling people about the tour.
An optional membership fee which gives certain privileges as Paulie mentioned, whether priority for seats etc is a great idea.
Personally going back to the original 3 options, would it not be possible to set up the APAT poker site for this season, combined with either option 1 or 2, with the aim of letting it grow to the point where it can stand on its own and fund future seasons on its own? No harm in having a 2 or 3 year plan rather than going dave style balls out for this season?