He has perfect temps, perfect humidity, perfect setup, perfectly cleaned tank, an "expert" friend, and the temps were "cranked up" to 88*f

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Everything is perfect! You're all silly for trying to help someone who knows everything is perfect. Everyone here has been trying to achieve this for years, he has accomplished it much sooner! Why bother wasting your time?
Now if you're serious about asking for help, listen closely.
Hot spot - 90*F
Ambient temps (temps everywhere the hot spot is not) - 80*F
Substrate (the stuff on the floor of the tank) - newspaper, paper towel
Water bowl - big, clean, filled with water (important)
Hide - 2 hides identical.
Tank - black out 3 sides if you want to see your snake. He will feel more comfortable and come out more.
Humidity - 60% raise it if he sheds. Simple misting.
CLEAN the old tank. If a snake died in there that was perfectly healthy before it came to you, odds are it's something there. Toss out everything but the glass. Especially that old substrate.
Uth (under tank heater) - get one.
Thermostat - controls the uth. Makes sure the heater stays at a steady temperature.
Now that the set up is all done and has had a few days to get going. (temps are steady, humidity is good) you're ready to get your snake!
When you get it, pop it in the enclosure. Leave it alone for a week. Feed it a prey item about the same width as the snake. If it eats you can start handling a few minutes every day. If it doesn't, come back here and we'll trouble shoot with you.