Have you considered using 23 and me or ancestry DNA testing to try and find more family members who may be similarly interested in familytrees?

Even if you don't find your biological father you could find your families history and even some causes or uncles and aunts related to your father.

My mother had 23 and me DNA Testing a few years ago and we descovered that she was 24% Spanish when we had thought she was native american. There are countless third cousins , and other related to us who also used 23 and me because we all similarly had no idea where we actually are from and only had stories.

I bought my husband and I DNA testing kits from ancestry . com during the fourth of July sale the were only 79 dollars each.

Considering you've already raise 600 dollars from your go get funding site, I believe the next best step would be to use the money you have earned to give your children a background history of your DNA regardless of who your biological father is.