An update market and social media precence for a small company

Hi,
My girfriend has her business that needs a bit more social media prencence.
We have a wordpress site at www.ruralsimplicity.co.uk
We have an etsy store connected to the website, https://www.etsy.com/shop/RuralSimplicityStore
A FB account where news WP posts are automatically are posted: https://www.facebook.com/RuralSimplicity.co.uk/
A twitter account where news WP posts are automatically are posted
An instagram account very little used, and currently only posts images to the WP site: https://twitter.com/ruralsimplicity
A not used pintrest account.
What would it cost for you to streamline our precence and market us?
Im looking for a fixed price offer

We look for help with getting followers on the social media platforms.
Preferebly help with a smart way to cross post updates to the different platforms
maybe update the WP site to be better looking.
Other suggestions that would increase our presence on social media and the webb that can help drive business up.