Veteran and Family need a furnace

My name is Matthew Welch. I am a combat wounded Iraq war veteran that needs help to replace my boiler. On 12Mar2018 around midnight, we had a CO alarm. The local FD came and got a reading around 40 ppm. The house was vented and we were cleared to return with the furnace off. I had the boiler inspected and a crack was found. I am trying to raise enough to replace it with a high efficiency boiler. Thank you for the assistance.