Husband quitting job for business stressed

I’m stressed coz we have a 2 month old baby and my husband is quitting a 100k a year job to start his own business and using up all our savings .. I don’t want to stop him but I’m a SAHM recovering and no family around and this all has made him very busy it’s just strange timing with a newborn ...he did spend two weeks helping me but now he is barely home coz of his job which he is quitting soon plus this new business...is he being stupid or should u let him use all our savings? He’s a smart guy but spending all this time and money what if this doesn’t work?

Update : I should add the business is something he has invented and would like to now market and sell. Yes sounds amazing but he’s already spent $50k of his own money on it.