Amazon Affiliate first time creator

Currently building an Amazon affiliate site, have chosen a niche with low competition keywords. Having read so much information I am rather confused about costs.

So far I have spent
£250 on WordPress business
£9.99 a month hosting

Having been reading about themes and plugins and these are all around £50-100 and this is all money spent before outsourcing content.

Is this normal expenditure for starting a site?

With so much information and reviews of high end themes that promises money I…

Amazon Affiliate first time creator