I'm shocked no one has mentioned this so far..
check the SEO profile of the domain you're looking to buy, if it has a strong domain authority and pulls in organic traffic just through the domain name I would purchase it straight away. Use these factors to determine if it's 'worth it'.
It would be great to get your advice regarding my company. I've started a small company and have 5 clients currently, I manage social media, SEO, website changes, content writing, etc. I'm charging a small upfront fee (about £500) followed by a monthly retainer for a minimum term of 12 months (£300).
The problem I have is that it doesn't scale at all. ALL of my time is spent on SEO, Social Media Posting (Creating posts and then scheduling them), and finally content writing for blogs. I could hire people to do these things (i'm actually struggling to find jacks of all trades like myself) but the problem is that it's no longer profitable if I start hiring.
Any advice? It would excellent if we could chat privately somehow.