I think you will be fine doing it on your drive way, i did my rear one first, and as I mentioned, had to go to a local place to have one of the nuts removed, and then the exhaust issue, so ran out of time to do the front one, which i did the next day. I think if you allow a day to do both, that should be fine. If you can, soak the rear nuts and bolts in GT85 or something similar, as they are the ones that will be rusty due to being exposed to the elements. If you chock the front wheels, and put the rear of the car on axle stands, you will be fine. Just remember to remove the back box, or drop it off the hangers, dont bother struggling to do it with it on.