@Charles Hunnewell
As @Paul Beets mentioned, it depends on your motivation.
If you want to do some deals to generate some quick income, then wholesaling is a great place to start.
However, if you want to build a scalable wholesale business, doing 100s of transactions per year, you will need systems. These systems will need to be tweaked to deliver large quantities of leads, daily. This business is about finding opportunities, quickly. Unfortunately, we can't just visit the MLS or Zillow, and start buying houses.
To really capitalize on those leads, you need a reliable list of buyers, not just a list of email addresses. You need to understand exactly what your buyers are looking for, individually. You need to be adept at many strategies, not just the typical rental units or flip units. As you grow, you will be contacted by a variety of investors with different strategies, if you want them to become a client, you better know the process of that strategy. This will help you broaden your horizons, and tap into those investors that don't take the traditional roads of investing.
You need to identify and bring value to an investor, beyond simply a great deal. The more valuable you appear to them, the more business and referrals they bring. This can especially be true, if you can be creative and structure financing or even favorable cash positions into the deals.
Whether you want to do a dozen deals a year, or 200, it takes a lot of work. I will say this, it takes substantially more work to do a dozen deals, than it does 200. If you're only doing a dozen deals, you don't need a sophisticated system in place, simply drive some streets weekly, and you will have plenty of opportunities. You will most likely being doing the all the leg work, manually. This means a lot of spent hours, looking up information. However, when you have automated systems in place, all the leg work is done for you. You just have to figure out what method of contacting the owners, works for you.