I have an interesting twist on how I have done it in the past. I will buy a domain and use it as a development domain for blog posts and things of that nature. Then over time it will gain DA and PR. Then I will sell it off and buy another development domain and start the process over. Not quite the process you mentioned, but it works. People will link to the development site to show things off as well sometimes, so that helps.
I founded this site back in 2007. I lost $50 to a data entry scam when I was still in college. I felt ripped off and had no recourse, but to suck it up and pull an extra shift delivering food to make ends meet.I setup this site so no one would have to go through the same experience I went through. I wanted to stop scam artists from preying on the vulnerable and help regular people learn the true, legitimate ways of making money online.
Here’s what you DON’T want to do: Target prospective buyers based on their perceived economic status, without any insight into the industry you’re targeting. “Lawyers seem to do well,” you think, “maybe I should start selling names to them.” So you rush out and buy a bunch of domain names you think would appeal to the law firms you’ve identified as potential buyers. Without knowledge of the space, you may not know that the American Bar Association and other industry-specific organizations set rules that govern some aspects of legal advertising. You’re not going to strike gold selling names your target buyers can’t use.