Main sewer line backed up...AGAIN 3rd time!!!!

Hello all I'm here asking for any and all help that I can get. After our mom passed away on Thanksgiving my sister Dawn worked to get a house. All while this was happening I was fighting with a lawyer for disability and I have no income at this time. Dawn has been buying her butt to cover all the bills so im trying to do this and take some of the responsibility off her. So this is the 3rd time we have the main line back up and will now need a major repair costing $4,000+ All donations will go to the repair and a deep cleaning from the back up of sewage.