Welcome SIR! there great fish just dont be underestimated on the growth of the RTC i couldnt beleive my eyes on the rate of those fish grow. Just a little advice im not here to give you flack or discourage you, just giving my personal experience story. i bought 2 RTC @ 2-3" they out grew a 55Gal in 4weeks then to a 90gal and grew that out in another 4-6weeks then put them in a 240 long, so as it seems you have read up on these Kitty cats 800gals isnt enough but id start lookin for a bigger/pool/pond cuz a RTC can reach up to 15" in a matter of 8months or less or more, depends on the fish and water and food sourse!!! Take care and the best of luck to you!
MFK is the greatest resource I've found for/from Monster Keepers!!!! 
