I almost get uncomfortable when people call wholesaling a cash cow. To inexperienced and people new to wholesaling they get this unrealistic expectation of how they'll have to do little then get this massive return. Can it be a cash cow? Sure, but it becomes a cash cow from feeding it. Generally people that are making HUGE and consistent returns are those constantly pouring money into marketing, cold calling, door knocking, networking, etc. So I guess in a sense any strategy can be a cash cow if you put enough time and money into it.
@Jeff Amore search "yellow letters" or "direct mail" and you'll literally get TONS of hits. I use listsource (a lot of people here do as well) but there's other sites. After tweaking your criteria you can go for absentee owners in certain areas with a certain amount of equity etc. There's countless ways to find buyers and sellers. Sometimes I sit on youtube watching wholesaling videos taking notes.
I haven't gotten my first deal yet but I'm pretty comfortable talking to sellers and feel pretty confident with the help and expertise of others I can close on my first deal when ready.
As for my biggest fear is time. What if it takes 6 months.... 9 months.... a year to get my first deal. I know it's very well possible that it can happen I just don't want it to lol.