Bummer about your mom and your cancer bud, my sincere condolences.
Checked everything and it still won't start...
After trying a bunch to start it there could very well be a puddle in the crankcase.
Just pull the plug and pedal it up the street and back with the clutch out and throttle off to blow it out.
As mentioned it could be timing or even a weak magnet, it is an old magnet after all.
Here is the link to the great magneto mystery
http://grubeeinc.com/Magneto Mystery.html
A bit out of date, but then again so is that engine ;-}