A gig does describe well what I do
get a start time, the length of the gig depends on the profit/loss during the term of the gig which may be lengthened or shortened depending on receipts.
Any opinions expressed by me are mine alone, posted from my home computer, on my own time as a free American and do not reflect the opinions of any person or company that I have had professional relations with in the past 59 years. meep