Maybe you should just start a page up on facebook and ask people to send you money for doing nothing at all.
If you can't afford props then you can't buy them.
When I think of the word "fundraising" I think of worthwhile charities who actually NEED the money to continue helping people.
As above - sell old things, get another job, try and charge for your modelling - another idea is renting props which would work out significantly cheaper than buying them, if you are in an antique shop or something you could maybe even ask if you can do a photoshoot there out of hours so you can use their props. Could even ask the photographer if he would be willing to take some shots of the shop for their own purposes.