check out yongnuo stuff
They make some awesome stuff for someone on a budget to get into off camera flash
I have a yongnuo 560 flash, a bunch of 603 triggers, and some of their new 622 triggers. I also have a vivitar 285 hv that has served me really well.
Something along the lines of a 560 or two with 603 triggers would be a good place to start.
Check out Jamie's flash guide, too, some good info there if you're looking to get into shooting with flashes
https://www.newschoolers.com/ns/forums/readthread/thread_id/696088/