Recent discoveries have shown that Google reduces the value of your links when multiple PBN domains are hosted on the same host. Because of this you will want to limit the the number of domains linking to your money site that are hosted together. For most people you will want to stay at 2, and if you have a lot of sites, a maximum of 3 per host. The good news is that the cheap hosting does not need to be good hosting for your tier 1 sites, it just has to be able to have Google spider it every few days.
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