750 hours is good going I like a fair bit of faff time.
70 hours in a month my wife would leave me. and my kids (aged 4, 6, 16) would forget who I was.
I guess dependant on shifts I will be 5 - 10 hours a week.
so maybe 2 years is doable, I couldn't afford to finish in 6 months. one of my argument for building is its 100ish a month for a couple of years for a hobby. I can do bits with the kids as well.