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The biggest advantage with LN and Veritas is they can pretty much be used out of the box. Other than that you pay a premium for branding.
As @stevo_com and @wildwest have said a bit of work on old bailey pattern planes will give you a great tool for relatively little outlay (all the LN stuff is high end modern reproductions of bailey pattern planes anyway).
If you really want a new plane look at the Axminster Rider range (still need some set up) or Quangsheng planes. Both are decent quality tool steel but come in at a much lower price point than Veritas or Lie Nielsen
Hand planes for hobbyists - is it really worth splashing out on a veritas or LN? Or is there anything more mid range worth buying? Specifically looking for a low angle jack plane