Ratties Thinking about maybe adopting?

Im thinking of maybe adopting 2 female rats from a shelter near me.. or maybe just fostering for a bit since it doesn't seem that I will be able to adopt pigs until I move out on my own.

If I do, I will be building a large mesh grid cage, and reading up a lot, but I would like to hear from other rattie owners about their experience with these little ones before I consider adopting..

Any thing you can tell me would help! Thanks!