well if you have decided to go with a tub set up humidity should be easily controlled by ventilation aka how many holes you put in the tub. That can also control how well the tub holds heat the more holes you put in a tub the more air circulation you get. So i would suggest setting up your tub before you get your snake you can set a tub up easily in about a week. I suggest getting an accurite thermometer/ hygrometer. Before you do decide on a tub size you should however decide if you want a hatchling or a subadult or even an adult. Your snake will need a different size tub depending on there age. Balls like a tight space as a hatchling so if you are buying a hatchling and putting it in a cb70 it can stress due to to much space. but with the cost of tubs you can also get several tubs for different times of year. being in the midwest the humidity gets low naturally in the winter. So you could have a winter tub with less holes in it and a summer tub with more holes so you can adjust your humidity as well as keeping heat in in the winter and allowing more air flow to keep the temps down in the summer when its 95 outside. On the holding your snake after it is settled in handling is kind of an individual thing some snakes don't respond as well to handling as any other animal. but We handle some of ours daily some of our weekly. And if my I had my way I would handle some of them hourly. But its up to the snake. If it starts to stress you need to put it up.