Well, lei’s are a cheap favor. You can usually order these from Oriental Trading Co pretty cheap. On their website, it shows a set of 100 of the poly plastic lei’s for $18.00.
For $27, you can get 7 dozen two tone plastic lei’s.
There are also other things on the site with the luau theme. For around $5, you can get 72 temporary tropical tattoos, but you’d need to do 2 sets. They also have a set of 6 dozen fish keychains for $9.95, but again, you’d need more than 1 set.
There is 100 piece sets of the coin bubble gum, but instead of being gold coins, they are brightly colored with palm trees on them, for $4.95/100 pieces.
For $7, you can get 7 dozen hibiscus print calendars.