Based on the recommendations of others, I decided to NOT install a huge inverter until I need one. Instead, I picked up a cheap ($40-ish) inverter that will allow us to run a fan, a tv, etc. Not wanting it to take up any of my wife's cabinet space, I found that it would fit perfectly in the wasted space between the side cabinet and the rear cabinet in our 24.1.
The 12V cigarette plug is in the upper cabinet, all the way to the right, up against the driver's side wall. I drilled a hole through the cheap board that is between this cabinet and the side cabinet above the driver's side bed (completely hidden from view), which allowed me to pass the cables through from the plug to the inverter. After that, I simply put two screws into the base of the side cabinet to hold the inverter in place. I also put some serious Velcro on the back of the inverter, just to keep it in place a little better and to not stress these two screws as much.
Overall, it turned out really nice and it works great. Now, if we are in a place without SP, or can't run our generator, and we want to watch TV or have a fan on, we can quite easily. This is a nice way to test out what our needs are before putting in a much bigger investment AND potentially screwing up my electrical system big time!