That's still WAY more expensive than it should be cut the sole to get to the tank...sounds like they quoted you to take a Sawzall to the sole, then lay a whole new teak
and holly sole, and then added a 300% "smelly stinky job" surcharge. Which, btw, it doesn't HAVE to be if the tank isn't leaking so much that you can't thoroughly flush it out. I love your plan to create a hatch
...I did that on my own boat...4 new hatches. Get other quotes to just deal with the sole (floor)...you can do the rest yourself, honest, for well under $1000 unless you want to replace your toilet with an all china
I'm really surprised Ronco doesn't have a good fit, 'cuz they have more 100 NON rectangular shapes. However, there are other MUCH better locations for a waste tank than where the current
one is...so let's explore some alternatives before you order a custom tank to fit that space.
I'll look forward to your email