Several of the parents had to move multiple times. Probably accepting less-favourable prices for their old home in the process, not to mention potential loss of career advancement opportunities when you're having to move house constantly.

Other parents were compelled to hire full time security[2], which can't be cheap.

[1] https://www.timesofisrael.com/parents-of-jewish-sandy-hook-v...

[2] https://www.mediaite.com/news/alex-jones-false-claims-forced...