I had a budget wedding years ago and the only thing I really regret was not having a professional phtographer- that is where you should splurge. you xcan't reverse time
My husband's cousin asked my husband to take pictures at his wedding, and my husband refused. He said it was too much responsibility. He only took outdoor pictures up to that point -- of scenery -- so I don't know why his cousin even asked. If necessary ask several people to take pictures at different times if a professional team is out of the question.