Should you hire an outside digital marketing agency or hire within?

Should you hire an outside agency versus keeping it in
house for your digital marketing? For most
companies, the individual in charge of digital marketing is usually
just one person? There is more to digital marketing than
just social media Digital marketing allows small business to have a
competitive advantage with a much smaller advertising budget
Digital marketing is an ever-changing landscape. It costs roughly
$4000/per employee to hire someone, this does not include salary,
benefits, hr, taxes, etc. Who knows how long that person will last
Getting someone up to speed on strategy does not include costs of
all the materials, software, platforms, to manage effectively What
kind of tools do you need - how much time do you spend researching
everything to find what works for you? Hire experts, team over
individual, stay in your lane