>>how deep should the soil be?
For hatchlings and juvys i give from a few inches to a foot of substrate.
>>whats the regular humidity?
80 to 90 percent!
>>have retes stack
Great!
>>how many crickets/mealworms per feeding?
Until it no longer shows signs of hunger.
>>how much ground turker per feeding?
Same as above but its best to stick to whole prey items.
>>should the water bowl take up almost half the tank?
Not necessarily but it should be large enough for the monitor to climb in and soak but not deep enough for it to drown.
>>is one twenty degrees too hot or fine?
No, not for (surface) temps but yes for (air) temp!
>>is decomposed granite good for the substrate?
Excellent!!!
>>when should i handle him if he arrived yesterday?
After about a month.
>>how long per day should i handle him?
Thats debateable. In my oppinion the best approach to taming monitors is to gain their trust by feeding regularly, doing cage maintenance with out bothering it(making it feel threatened) and eventually it will come and investigate you which will possibly lead to handling.
>>
>>thanks - john may

-----
James Grigsby - " When you try of all your forces to make your own way, you will help some of others and will be helped by others. As long as you do not make your own way, you cannot help anybody, and nobody can help you. " (Shunryu Suzuki)