I have been here 34 years and Irma was the first time the power was
out more than a day and that one day outage was Charley.
The main advantage of propane for me is, it starts instantly and I can
put it away again just by unplugging it. No draining carbs, running
dry, stale gas etc.
I also have the kit to run off of a 20# tank if I want to take it
somewhere for a small job.
The only precaution I noticed about "DIY" conversions was the lack of a
detector to shut off the propane flow if the generator engine should
stall. Otherwise you could be in the making for a grand experience.
The only problem I had with bad ground was a missing connection between the
ground line and the neutral line . We had a float of 12 volts on the hot
to neutral. So sometimes the disk drive would fail to start.