I thought about doing it on my Mainecat 41. One of my challenges was that to get the proper amount of insurance, the bill was something like $7000 annually. It pretty well ate up any income unless I was hardcore and diligent about doing several trips each day and charging 'whole boat' regardless of the number of folks who actually went out. Many owners may do it 'under the table' insurance wise but I'm unwilling to take that risk.
I'm really not able to now, since I let my Unlimited Masters License expire this year anyway.