Swore off this in 2021 and I'm back looking at a spreadsheet, so I'd like the counterargument before I spend the money rather than after.
The plan is twelve sites, not thirty. Aged domains with real profiles, separate hosts, real-ish content, each one linking out maybe four times total.
Costs as I have them for year one:
domains 12 x $180 avg (aged, at auction) 2160
hosting 12 x $6/mo, six providers 864
content 12 x 15 pages 1800
renewals year two onward 420/yr
Call it $4,800 to stand up and $1,300 a year to keep breathing. Against buying 48 links at $250, which is $12,000 and buys me nothing I own.
The question I can't answer is what happens when it breaks. Not if — when. Twelve sites is twelve things to keep alive, and the failure mode isn't one site going down at 3am, it's all twelve going quiet in the same week and me finding out from a rankings drop. What's the actual argument against?