you dont need a rack system for them. Just get yourself a 20 gallon tank and a water bottle..
rack systems are only of a benefit if you are breeding larger numbers of rodents.. like 5 groups of 1.2 for example..
from 1.1 rats you can expect 7-15 pinks every 3-4 weeks or so.. so if you needed weekly pinks (live i would assume?) then you can plan on 1 female producing 7-15 every 3-4 weeks and figure out how many you need from there.
the biggest drawback is you cant plan WHEN the females will drop.. all mine seem to go at the same time.. so ill have 100 one week.. and none the next.. LOL
as far as for the sav goes.. not really sure.. you might wanna goto the monitor forum and see what the proper diet for a sav would be (ground turkey, crickets, mealworms?).. its been ALONG time since ive had a sav monitor
best of luck
dan