Nothing for training, you provide your own housing. Pay is by flight. In the singles you get 30 for air onlys (1.6 hours logged) and 45 for air grounds (1.7 logged and a 3 hour layover at the canyon with a free lunch). Tips constitute a big part of your income, typically 20 per flight in the singles. Plan on a mix of the two, typically 5 to 8 flights per week.
It gets a little easier when you get the upgrade. 40 for air onlys and 55 for air grounds, and as an added bonus, they tend to "shuttle" you (6 to 8 legs back and forth, 2 of which are empty, they pay you for the full legs divided by 2 on the air ground rate), makes for more flights and a larger paycheck. Also, you make more in tips because you carry more passengers. Upgrades depend on availability, your performance in training, and PIC multi helps. I doubt it would take you more than 9 months to upgrade. The 402 also comes with a 6 month contract.
The busy season is June through October, then it drops off real quick in November and picks back up in the spring.
Hope that helps, any other questions?