You may choose to finance your family reunion in a variety of ways. Depending on the type and length of reunion your family is having, you could establish an overall budget and ask each family to contribute a set amount, allow each family to finance a different aspect of the reunion, or have each family finance only their portion (their own tickets to the amusement park and meals, for instance). However you choose to finance the event, it is best to at least give each family a good estimate of their expenses. No one enjoys being surprised by the tab as they're leaving! Give families and individuals as much advance notice as possible about what and how they will be expected to contribute to the reunion financially.
Collect all funds well in advance
Do you like?
In addition to having an auction and/or a garage sale to raise funds, you'll likely want to get some members of the family who can afford it to pitch in. They'll agree, but then.......There's nothing like money problems to sour a family relationship. When someone promises to pay and then doesn't, it gets very dicey because it's family you're dealing with, and you're not inclined to hire a collections agent to go after them. The only way to success is to start planning so far in advance that you can plan, get the money for your plan and proceed (or, if you end up not getting the money promised, you'll still have time to scale down the plan). Be sure to keep an accounting of how the money was spent, in case contributors ask..
Do you like?
In order to fund the fun of your reunion you can have mementos such as tote bags, t-shirts, hats, etc. that can be sold at the event above cost. Consider what items might sell best among your family members.