Hey there
As every SEO professional knows, it much better to get a backlink from a real company in a specific industry, rather than a generic business blog that has a post about every topic.
We're an SEO agency and web design agency that manages a number of websites (our own sites and our clients' sites). We don't own any blogs but rather websites of real companies that are already ranking on either page 1 or page 2 of their own respective industry keyword.
We currently manage 2 music school websites -- one of a violin school and another of a guitar school. They currently rank on page 2 on Google.com.sg for the keywords "violin lessons" and "guitar school" respectively and their schools and websites have been established for over 4 years.
We are accepting paid guest posts.
Alternatively PM me for more details and the industry you're looking for.
Feel free to use Ahrefs to verify any details that we give.