Buying a whole bunch of relevant high DA sites to connect back to my low DA site. Is this crazy or legit and why?

I have this idea that I got from some friends to spend $100 to buy a few relevant domains. Some benefits include you can now use their articles on your website and somehow take their backlinks.
I know how to look for link farms and spammy websites, so should I do it. Is this crazy or a legit way to do things?

Questions you could answer:

1. How do you "take" their backlinks?
2. Can you take their content?
3. How much can it affect your SEO?

submitted by /u/Defiel1
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