If you want to read about pond construction, I have a compilation of links you can find here in one of my threads: http://www.planetcatfish.com/forum/viewtopic.php?f=4&t=33968&hilit=+blues
Another knee-jerk reaction: it may be better for you to consider living in tropical or sub-tropical climate on a well water when you are ready for your dream. Heating 9000 gal can break almost any bank, unless you are made of money. Otherwise, very serious attention will have to be paid to insulation. It can be done. Ted from Seattle (see my compilation) has a tropical 1800, 4000, and 8000 gal pond OUTSIDE but I am sure it is a great pain in the neck to keep it warm enough still.
Thanks thebiggerthebetter, sorry I have not replied to this in a much quicker fashion.....at first I was not even sure you wanted a reply.....but there is something I wished to know more on. You said that you had a large compilation of links for constructing a pond, I checked out the link you posted, but it mainly deals with constructing windows for your tank (which actually may, or may not come in handy....I have not decided if I am gonna add an underground viewing station or not.....sounds rather expensive....but so is the entire project....so that is still a maybe).
About the heating.....I have planned to secure the room's temperature and try to make it more like the amazons itself. The tank.....which is going to be created more like an in-ground swimming pool (which I believe might be best if the filters clean by filtering runoff into them, dumping clean water back into the tank above....but there might be a more efficient way, with better currents solution available). The room will be insulated and designed more like a green house than a traditional aquarium....if the whole room is kept naturally hot, the water should find it easier to stay hot. Of course fresh air would require pumping in, and there would need to air conditioning.....just in case it gets too hot even for a day in the amazons. The tank will pretty much have no cover (other than the green house around it) like a pool, but I believe that sloping the sides instead of straight edges, will benefit both the fish and us (RTC's are strong, and I have heard of them jumping out of tanks before....sloped edges will prevent this).
I found your advice very helpful, and I plan to get the API Liquid Master test kit that you mentioned, and I will soon start testing the water, and how fast filtration works. Once its good, and everything is perfect in the tank, I will add a goldfish, starting down the path....and so on....
Oh, and have you ever heard of large filters that can clean even faster than in three weeks? The tank I am going be designing, will probably need much more effective filters than that.......but I believe those can probably just be custom ordered....I will check with some zoos and aquariums, see what filters they are using and such.
Thanks again for all the help thebiggerthebetter, and everyone else. I am very thankful that this community exists....Monster Fish Keepers is truly a really neat site with a great group of people in it. Thanks guys for all the support