Let's say you had £15,000 to spare (or the $ equilevent).
What would you build, how would you spend the money and on what.
Let your imagination go wild!
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Assuming your niche is X.
I would spend all the money on placing myself on becoming a thought-leader in X.
I would spend the money to create new engaging content and acquire as many followers as possible on Twitter and LinkedIn (or TikTok if you're not a b2b but instead b2c)
TBH that's what I would do, audience trumps product these days