It would be a dramatic change in lifestyle. Both in the income you receive, which translates to the stuff you can buy or trips you can take. And in the pace and enjoyment of work.
Do you want a less lucrative job, that may require fewer hours of your time...and the time spent at that job is more fun because it is something you enjoy. Or do you want to work longer hours for better pay, and be able to afford more expensive stuff and take vacations every now and then?
Anything you do will eventually become a chore and you may not like it so much...so you have to compare the job you have now, to the job you would have as a boat captain and scuba instructor (and don’t forget that means you’re also the sales/marketing guy, the accounting guy, the customer service guy, the maintenance guy...you will wear many hats).
Doing what you love isn’t an option for most people unless they have hardly any responsibilities or they have money in the bank. Or they are willing to sacrifice and live a less expensive life.