Question about hosting PBNs

What is the best option out of hosting's to host 1K PBN's

What best is to go for dedicated pbn hosting and purchase one IP for each domain because you can easily manage
Purchase domain from different domain providers
Add cloud flare to each and every domain

Or you can go for dedi server with IP range

The best option is 1000 different IPs in different data centers from different hosters in different countries.