I do 5 gallon BIAB batches in an 11 gallon kettle and 10 gallon batches in a 15.5 gallon keggle.
An average 5 gallon batch requires about 6.8-7.0 gallons of total water volume. During the mash with the grains in the 6.8-7.0 gallons of water, the grains displace up to a little under the 9 gallon level of the kettle, so you're good with a 10.0 gallon pot.
Primary #1 - Midnight Ryeder (Midnight Wheat and Rye)
Primary #2 - Florida Weiss
Primary #3 - Kane-DOH APA (Honey Citra APA)
Secondary #1 - Downtown Flanders Brown (brewed August 2012)
Keg #1 - Raspberry Florida Weiss
Keg #2 - Cinnamon Raisin Cider
Keg #3 - NONE!
Bottled - NONE!