Owning a trawler size boat is expensive, but how expensive is up to you. If the boat has to be perfect it can be very expensive. If you can do a lot of the maintenance your self and can live with a few nagging things not quite right, then maybe not so expensive.
I have put a ton of money in my boat and don't regret it. I can afford it but it has taken away from other things; priorities.
I am nearing retirement and calculate ownership of this boat for 2 years after I retire. I do like having everything working right and will do the work and pay as necessary to keep it there.