Are you going to have the time needed to maintain a tank that large? Do you have the time needed to build your own system. Sounds like you are looking for someone to hold your hand. I can understand your situation. I would recommend trying to find a local club.
If you don't want to go that route then do your reading here. Learn as much as possible. Design your system and then being your plan here. Then we can help you tweek your plan Part of the fun in building a system is the design. There are no systems exactly alike. You will enjoy the whole process. Building a system from the ground up takes a while. I built my 90 last spring. Took 3 months before I finally got livestock into the tank.