Utilize your financial knowledge, give your answer or opinion to the input question or subject . Answer format is not limited.

What to do if my aging father is sustaining a hobby that is losing several thousand dollars every month?
You've already counted the cost. It will cost your family ~$10,000 per month until your father dies, or until there's no money left, to enable him to pretend that he is a successful business owner. I'd ask him when he thinks business is going to pick up again.  He may be honest with himself. Or, ask him to consider what will happen if he outlives the money that's going out the door.  Ask him if he would like to be bankrupt on top of needing to close his business. (I don't view asking those questions as being unloving, by the way.)