I wait till it's indexed, then I link to my money site, and a few other sites/pages that had 0 links built to them in the past 3 months, then I track those sites/kw's to see if the PBN is infected, in most cases it's not infected, but if you get an infected one it can screw you more than you could think of. And if you don't know what to look for when buying domains, then you're getting more infected ones than good ones, most likely.
A tip for beginners, bid for domains that cost 200$+, people who can afford those already did the research for you and those domains are 99.5% clean. It's better to get x5-x10 of those and rank for an easy term, than buy a ton of shitty ones and don't rank for anything.
P.S. If spending 1k-2k is a lot to invest in a business, then better go back at flipping burgers until you save enough.
