Of course we wish you the best. And kudos for the extra effort of contacting local enthusiasts.
But I am not really even sure a hobbyist would like this sort of tank.
It is way off the ground for viewing, so you really can only see large fish.
It has plastic inserts, not real coral.
Agree with above, it seems like something you see on the TV show "Tanked,"
not something you would see with people in this club.
Unfortunately, parting it out, for fish and used equipment, you would be lucky to get $10K.
When I put my pool in - I spent a fair bit. (Far less than $200K though)
But I know that a pool will not add value to the house. Might even lower it a bit.
This is just like that.
Just try to sell it, and hope for the best.
But really, convince the owner they will not get value added out of it, and price appropriately.
(Like $1.75 M)
KEY: As a hobbyist:
When I look at that tank, I think "Wow, cool"
I do not think "I want that"