Chris, after starting an ISP[1] in the UK in 2014 I certainly feel you're pain around the difficulties in starting an ISP! Myself and my co-founders have often looked at the comparable easy of growth software based startups and wondered what on earth we were doing, but we soldier on and our looking at our reliable, contracted MRR now is certainly starting to make up for it :)
Good luck, I look forward to keeping up with how things are going your side of the Atlantic.