While sometimes Monitor keepers phrase things rather bluntly, there is a point to what is being said. When acquiring an animal such as a Nile/Ornate Monitor, at the very least, a sub-adult enclosure should have been ready before taking the animal into your possession.
I don't know if you realize this or not, but they grow at a very rapid pace under good conditions. Using substrates such as newspaper or paper towels will lead to toe/toenail/tail loss. It is also bad for their respiratory system and they will become very dehydrated. Especially with the basking spot they require.
With so much poor/misinformation already going around about Monitors, I can see why someone might be concerned over someone giving advice that isn't following the suggestions they are giving others.
Not to mention, even a VERY aggressive Iguana isn't in the same realm as a "puppy dog tame" Nile/Ornate Monitor. These animals can cause some serious damage. Suggesting a Savannah or especially a Water Monitor as a beginner species isn't advisable either. I wouldn't consider a room sized enclosure the only drawback listed for keeping Water Monitors.
Anyway, I hope you get Jack everything he needs and he does well for you. As far as I'm concerned, there isn't a greater responsibility in the reptile world than a very large, 99% of the time aggressive and unpredictable Nile/Ornate Monitor. Good luck, he's very cute.