Discus are not difficult
One key is water quality and not unlike many people now a days RO water should be used. Fish drink water to stay alive just like people and obviously depend on water a lot more than we do to live.
There are many things in ordinary tap water that discus and people should not drink - it's as simple as that.
Secondly is diet and temperature and PH.
Discus like a low PH under 6.0 and like most fish thrive on a varied diet.
There is much literature on diet and temperature and PH to supplement what I am saying, but keep it simple. and try to standardize whatever you do and have a regimen you stick to for maintaining the aquarium.
Auto feeders and lights on timers will help create a stable, steady environment for the fish - which is a good thing.
Water temperature can and should be in the high seventies to upper eighties.
I would do no more than 10% water changes every 2 weeks.
Keep the tank population static and decide what fish you want and how many in the beginning and don't add fish later on.
KEEP IN MIND THAT STABILITY IN PH, TEMPERATURE AND WATER QUALITY MIMICS THE NATURAL ENVIRONMENT WHICH NEEDS TO BE DONE TO INSURE SUCCESS.
You can add a larger number of smaller fish and if they start to pair off and as they grow larger spin the pairs off to a new tank using the old tank water to get them started. This may lead to a spawning pair which though quite challenging is a lot of fun and would be quite an accomplishment if you are able to raise the fry.
FOR THOSE OF YOU OUT THERE WHO WOULD LIKE OUR HELP WE WOULD SUPPLY THE DISCUS AND ALL EQUIPMENT, DECORATIONS, GUIDANCE AND SUPPLIES - HOWEVER WE NEED TO RESTRICT WHAT WE CAN DO TO LARGE ORNAMENTAL RESIDENTIAL OR COMMERCIAL AQUARIUMS WHICH WOULD JUSTIFY THE EXPENSE TO OUR CUSTOMER.