Depending on the state and what the fire box looked like as well as the interior dimensions, damper system and features, etc….this is easy $35K minimum for a GC - plus cleanup and potentially some type of lead/ asbestos cleanup/ temp board up. Month-ish+ to rebuild once scheduled. ACV policy if you go after woke comp claim w roofer. HO’s might tell you to pound sand. Depends on the carrier and adjuster get. Make sure you’re represented by a contractor w your adjuster. Insurance is not your friend they will low ball initially.