I am having a very low budget casual wedding I need advice?

I am having a small family and close friends only wedding in a family friends home. he has an indoor pool and hot tub so after the ceremony were having a pool party. So saying that the wedding is not traditional but i still want to look amazing in my pictures. I would really rather not get a manicure/acrillic nails because there so expensive. Should I just leave my nails clean with no nail polish or should i polish myself. and if so what color. my dress is white with a black sash and the wedding colors are purple and blue. any suggestions would help!!!