As to whether you can get a ten gallon yield will depend on a few things such as the gravity of the beer and the evaporation rate of your kettle. If by yield you mean into bottles then you would be pushing it.
Pure BIAB uses just a single vessel but some people who wish to get higher yields from their existing kettle might employ the use of a second vessel and/or dilution. When these methods are used we call it "Maxi-BIAB." Have a play around with "The Calculator". This will give you a good general idea of what you can expect. And, if you hae any questions, ask away.
PP