I recently did an owner assisted annual in about 9 hours total.

Granted it was a very simple airplane that I have maintained for a number of
years and no major ADs or discrepencies were found.

The owner removed and replaced all the floor boards, inspection plates,
fairings, while I did my inspection, AD compliance, leakdown, lube etc.

I keep my ATP Navigator on a Laptop and print out new AD compliance logs and
stick on labels for log entries and he flew out while there was still
daylight.

Cheers:

Paul
N1431A