Did this today.
Bought a $4.99 rotisserie chicken from Sam's/Costco. Break it down by hand, eating the skin and enough meat for a full meal. It takes less than you think since there is so much delicious fat all over the skin and on the meat as you break it down. The meat gets separated dark and white while anything leftover goes in the pot, including the bits and juice at the bottom of the carton.
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Add whatever aromatics you have on hand.
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Then fill the pot to the 4 quart line, cook on high pressure for 2 hours and let release naturally for an hour.
For this one, after eating a meal during the break down, I ended up with 1.5 lbs of meat along with the 4 quarts of bone broth.
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All for 5 bucks, less than a dollar of aromatics, and the to me to strain and clean dishes.