Before we bought our current, looked into getting add on jacks. Cost estimate were $3-3500. Now we have factory installed jacks and yes at times they can work well but it is not just push a button and play. You still have to put something under the pads or they may sink into soft ground asphalt etc. Mine ae supposed to be auto, but I have to manually level anyhow as they will raise the tail and keep the front low.
As to your driveway if you are planning to keep extended for parking it is not recommended as the cyl's may rust from over exposure. So you will still need to level with whatever your choice is. I use 2x10's covered with some of the dollar store meat cutting plastic sheets. I dont use the sheets when traveling just the boards. I have a compartment dedicated to level stuff which includes the plastic stack blocks. Over all we like the jacks but they still require some effort to use right.