Is the corporate world worth it? Especially starting in your 40’s?

So, I started out in the engineering field, but have slowly drifted toward more to the construction/project management side of things over the last 15 years. For the last 7 years I’ve been working for a small family construction company and while it’s been fun and I consider them like family, I feel I’ve hit a dead end and have a conflict of management styles with a particular coworker (long story). For the most part, I love my job and the flexibility and family atmosphere it affords. If we ever have anything to do, a quick heads up and no questions asked. I maybe work 35 hrs a week and am paid well, that’s not an issue. But, I do feel like I’ve hit my ceiling and again, there is one particular coworker that’s not going anywhere and is making my role tough.

A month or so ago, on a particularly rough day, I uploaded my resume somewhere and was nearly immediately contacted by a very large (Fortune 50) firm in a field I’m especially passionate about personally - about a position. I figured there is no harm in speaking with them, so I scheduled an informal interview. That quickly has lead to 2 additional interviews, the last with some VERY high level CEO’s and I can assume a substantial job offer is coming soon. The job will come with what I’m assuming is at least a 50% pay increase to start, as well as a much higher ceiling.

My only real issues though, this job will be at least an 8-5 corporate role, a little bit of travel (which I’m okay with) and a lot more structure. I’ve tried to hint around during the interview process and so far, they’ve been honest with “yea, this is an 8-5 office job, M-F”..

Right now, I’m afforded so much flexibility and the water is my life. If it’s 2pm on a Friday and I’m slow, I can currently leave work and be on my boat fishing in 30 mins. I’d most certainly have to give that up for the short term, at least until they trusted me a bit. And as it stands, I have a ton of vacation time - I never am short on days. This new position would start out with what I believe is 5 days for the first year, at which point they’d increase. (And there may be some flexibility on this, this is all just sort of what I’ve assumed based on my research).

I just have no idea what to do. In short - taking this would be at least a 50% jump in pay (over what I’m already okay with) in a field that’s literally a dream of mine, but a more structured environment and a set 40 hr week. But at the same time, a much higher ceiling and getting away from what I perceive as an antiquated, set in their ways system and coworkers.

Any insight, I would be most appreciative. I’d also like to add, this would be my first role in a company larger than 50 or so employees. I’d essentially leave my current job with a small company for one of the largest companies in the world - I’ve never worked with anything close to that. And all this in my 40’s. I just don’t know.

It’s essentially like going from a small auto shop to a design position with Corvette. In some ways I feel I’ve hit the lottery, in others I just don’t know if I have the energy to start over in something like that. Suggestions?