If you do 4 sets and a tour design/layout you end up with around 500 to 600 $ (depending on your costs) - I however would think that 4 sets are a little too few and an AVS would fit better

IMHO you can still start out little and cover your costs with minimal work so that you can buy other things from the exess money it generates (what I did so far)

Hope that answers your question

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