My recommendation is do not tackle a project that big by hand. You will be hating life.
Never do by hand what you can do by machine. If it's worth doing get a machine.
I probably would use SSR 2.5 or SSR 2 depending what works the best.
IMHO The paint every vehicle is different. Do a 2'x2' test spot and see what works.
Always start with the least aggressive method first. Don't kill a fly with a sledge hammer.
Start with SSR 2. If that is not giving you enough paint correction then use SSR 2.5
Follow SSR 2.5/2 with SSR 1 then black hole and your PB wax/sealant of choice.
IMHO a project that size could be completed with a machine in approx. 1-2 days.
Try it by hand...if it you are not getting the results you would like then get a machine.
You can not obtain the same results by hand that can be achieved by using an orbital DA.
Here's my results with a PB Polish a Porter Cable 7424xp and Lake Country pads.
CLICK HERE
However you choose please keep us posted on your results. Pictures are always nice too.