"1300SF = $800-900" is reasonable.
"$30K = 1300SF,中上學區" is very hard to come by.
Either you got it for deep discount, or this is a very cheap place (but how could it support $800-900 rent?) or it must be a rundown neighborhood, but you said 中上學區.
So things don't quite add up here...
Does it have huge HOA fee or other charges? That might explain it