The needing no cash for building/starting a wholesaling business is just a complete fallacy. Thousands a month are needed in advertising to extract good deals. Sure you can get lucky on a few hundred bucks mailer and make a buck to the buyer you have in the waiting, but to really build a wholesaling business is just that, building a business.
@Jay Hinrichs is correct that you have to learn how to sell in order to start putting up decent numbers. Also even beyond sales ability you need hustle. Yeah people don't answer their phone even after they call you , so you gotta stare that list in the face power out follow up calls.
(you can learn though, I do think gifted salespeople definitely have an edge over say a creative or analytical non sales person but you can learn and start to get good at sales (me :) )
But to start a wholesaling business without a decent budget is just silly. Also having been in the trenches for 10 years myself, me talking to a seller or buyer has a very different feel to it when I tell them I have purchased 50 SFRs in the last two years and am a very active landlord.
My point being, I tried wholesaling when I was total newb for all the reasons people get into wholesaling. it failed, I sucked at it. I then figured out that I like buy and hold and just stuck with it, but buy and hold is slow game (powerful game) and there is no get rich quick. I added wholesaling to my bag of tricks because we were finding alot of great deals for ourselves but couldn't take on too much at once. So we found some other buyers and we spoke the same language. We are actually ramping up our wholesaling business because our marketing just works, and we are not afraid to spend bucks. Like many thousands a months. PS we are also not afraid to close on the properties first. That sends a message to your buyers, "oh you own this I am not double closing or buying from an assignment?" - "no we closed on this, its yours if you want it for X price"
Also there is a fair amount of tech you implement these days for wholesaling and you need a fair amount of operations experience to keep things from feeling they are out of control.
We also only work with real buyers. Its pretty easy to determine if a buyer is just saying the yearbook words to make them sound smart. Cuz here is how it goes "oh why don't you like that one?" "price is too high or dont like the area" "ok cool so I have one next week at this price in this area you are ready to rock?" boom next week I find that property, buyer doesn't pull trigger or comes up with other lame reasons. They dont get calls again and are taken off the list. Cuz if its that good a deal and you don't buy from me we most likely will find another buyer, rehab it and flip ourselves or better yet, rehab and rent ourselves.
I love wholesaling. But I really don't feel like its a newbie game unless you have a couple of bucks for continued marketing, have a plan to find real buyers, a plan to market alot to find real deals and really stick to it for a while to get your rhythm going and even then you just might make a couple of bucks. (and by sticking to it for a while, like a year maybe to get some slow stride)