We have a customer who's putting in a 2000 gallon shark tank. He decided to do it after the house was already framed. They had to cut out part of a basement wall and add a bunch of steel to support everything.
2 brothers who have to out-do each other:
Shark tank boy is building an 18,000 sq. ft. house on 40 acres over a river. The other brother is building a 30,000 sq. ft. house on 5 acres over a lake.