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You can use SER to build a very very wide variety of links including T1. You can even manage your PBN with SER.I have a non-English site that I rank with SER alone.I buy lists. You can scrape your own but you have to be prepared to shell out quite a lot for a tools and services besides the time you need to invest to learn the whole process. TBH if you don't run an SEO service and you need proxies and servers anyway it's cheaper to buy lists.If you have a tight budget set it up at home. If you have money to spare buy a vps. Depending on the time you have available for learning SER the first 1-3 months will be practice, learning about tools and forum reading. You set up projects only to realize how badly you've screwed up and need to redo the whole thing.