Asking for donation so you can have a vacation is not really a great way to go about touring.
On the plus side..... If your frugal you can tour for less than $25 a day. Camping, cooking your own food and such. It would cost you this much to stay home at least.
Tons of people tour and raise money for stuff.... I really only feel respect for those that donate all money received towards the charity that they are riding for. Sorry but that is how I feel.
Better idea would be to round up as much funds as you can and tour until it runs out. Even $500 can make for a really nice tour.
Best,
kyakdiver