Your best bet is to join at least for a few meetings or find a way to order the at home version (I believe the do a flex pay) or online. I thought somemone said right now they are waiving the registration fee online.
I know at times money is tight but it is money well worth it and sometimes your health insurance will reimburse you some. You might check that out.
Another thing to consider is SouthBeachDiet which is very similiar to the W/W Core portions (after Phase I) without the 'WeeklyPointsAllowance"
So check out
www.weightwatchers.com and see if how best you can get all the info you need to be successful.