After 10 years of spending 100k on average per month, we stopped spending in 2019 and put money into cold calling. Conversions tripled and we could only spend half our yearly budget in our call campaign. Google is expensive and returns now suck even more than they did in 2017.
I find it incredible that cold calling works for you; everywhere I've ever worked in the UK and across Europe, cold-callers get short-shrift - with no exceptions.
Account-based selling has a few reps focused on a few key decision makers within an organization. It works exceptionally well for mid-market and enterprise software.