i have heard some people say only 2 tablespoons of food a day, but from what i have noticed, chins do not overeat, so i just put some quality pellets in the bowl at night and fresh hay, if they are out in the morning, i refill. always fresh water, i wouldn't treat with a raisin every day, sugar is bad for chins, but some here and there is fine.
for dust baths, its about 2-3 times a week, sometimes more in the summer. but not every day. playtime should be everyday if you can, about an hour, in a chin safe area.
as for the time table, personally i don't use one, i just go in on and off all day long and talk or chat with them.. wake them up [lol], pet them... always checking the food bowls and treat dish [i mean the dish i put all their chews in]. but i guess it might be good for playtime and stuff to always do it at the same time, not really sure if it matterrs with chins. sorry can't answer better, but i hope i helped some.