Hi Geoff
always difficult to predict hours involved in getting things apart on these old machines, rust is the big enemy and one rusted component that you can't get apart can take you a day or more to remove. All depends on what your neighbor expects and understands the problems these things present. Different thing when you are repairing one for yourself, it takes as long as it takes but if you are trying to repair one on a fixed price then you will always come unstuck. I had a bloke contact me yesterday wanting a cheap mower, I told him I don't have the time to build him a cheap mower because simple things just take up so much time when one thing goes wrong