Simple as licking your balls. Ranking a site normally with PBNs would be "simple". May require more work but it's safer.
With your method...
1) Need to be 100% sure target site will convert.
2) If shitty conversions how much time before G bitchslaps you?
3) Need to hit the buffer site with the right amount of 301s. Undershoot requires readjusting / clocks ticking down.
4) Overshoot you got that much more to lose / opportunity costs that don't come with normal SEO.
5) It's getting "harder", "more expensive", you gotta find niche domains as you
stated yourself 9 months ago.
6) You need a good aged domain as a buffer.
7) Lots of 301s if the niche is worth anything. That's a lot of money, time or skill.
If you're gonna go through all that you might as well just build a PBN.
Also, 13 months ago when someone asked about using 301's to churn & burn you said...
In my experience these days it is very hit and miss, and there are far better ways of churning a website.
The guy asked about
redirects? You're always saying they work "fine" or "simple".
I have no fucking idea why people assume GSA to new domain is churn and burn. It never has been, never will.
"
No idea?" How about basic economics? People don't "assume" GSA worked we know it worked cause many were
doing it in 2012-2014. The method was simple. Blast a shitload of spam as fast as possible then index. This is a small slice of a spreadsheet from 2013 of expired keywords & positions ranked with nothing but GSA:
make money online 1
make money on ebay 1
increase vertical jump 1
lose weight 1
lose weight fast 1
how to lose weight 2
cure diabetes 2
learn to play piano 2
get rid of acne 2
speed up windows 8 2
video making software 2
how to give blow jobs 2
get rid of cellulite 3
stop a divorce 3
how to stop a divorce 3
perfect golf swing 3
It worked on parasites, new domains, old domains. It was cheaper & easier than 301s back then. You having "no fucking idea" why people would do it raises serious questions about what you do know. I consider myself an amateur but I know this. What's your excuse?
-BB