...Could you give me a % range, thank you
after ~a month (average; might be 3 (max), or a day or 2) you'll get ~1 decred per ticket

-pls note also that the possibility exists for zero return
Good point...but 0 possibility for loss; remember, you always get back the original ticket cost regardless of if your ticket expired or was missed.
Anyway, scroll down to ticket section. There's an estimated ROI that is based on current ticket price and current PoS reward. It's typically ~1.3-1.5% ROI.
https://dcrstats.com/