[dboreham]

Only time + money. But more of both than you likely want to invest.

Disclosure: built my own ISP 13 years ago after a similar "how hard can it be??" moment.

[jessedhillon]

Have you written up this experience anywhere? I'd love to read that.

[dboreham]

No. I did give a talk locally some years ago but that's all. Like most of us I have a big stack of interesting things I could write about, if I didn't have roughly 2x as much work to do as there is time in the day already... One day!

[ccallebs]

I second this. I'd love to know how ISP companies back then were operated.

[pyvpx]

a bit easier with less scale; otherwise identically to today.