The only other MFK member with a 50,000 gallon tank is arapaimag. He's probably the only one that could advise you.
http://www.monsterfishkeepers.com/forums/threads/building-my-50-000-gallon-monster-mega-tank.8952/
http://www.monsterfishkeepers.com/f...5-000-gallons-mega-tanks-videos-thread.74879/
My only suggestion to you is to consider building your house around the tank. Arapaimaman did that around his 15,000 gallon tank.
http://www.monsterfishkeepers.com/f...5000-gal-tank-central-fl.190778/#post-2432540
http://www.monsterfishkeepers.com/forums/threads/building-my-50-000-gallon-monster-mega-tank.8952/
http://www.monsterfishkeepers.com/f...5-000-gallons-mega-tanks-videos-thread.74879/
My only suggestion to you is to consider building your house around the tank. Arapaimaman did that around his 15,000 gallon tank.
http://www.monsterfishkeepers.com/f...5000-gal-tank-central-fl.190778/#post-2432540