i've done stamped concrete for many years and have had a lot of good concrete guys think that they could do it over the years, they were all wrong. stamping is an art form and it takes a lot of practice to get good at it. its not only about how to pour a good slab but timing is everything. get on the stamps to early, big mess, too late, a different kind of mess. you are correct on doing it in seperate pours but where do you stop? hot/cold joint. will you have a boarder or band at your stopping points? do yours matts have joints or will you be using seamless matts? how many matts do you have? i would hope that you have at least 10 matts, a skin matt and some floppy matts. do you have any joint tools for cleaning up squeeze outs, and do you know how to corect any problems after the concrete has set. not only will you need to know what type of slump to use, you will want a rich/fatty mix (stamp mix) and if you plan on doing more than one truck per day, you will want you later mixes to have retarder added. im not saying that this cant be done but it is a lot harder than it looks. acid staining is a whole different kind of animal. mix ratios, nuetalizing, how long to let it burn, stuborn areas that wont take stain....i would look into eco-stain by sure crete design products, it is a lot more user friendly and the colors are more true to the color charts. acid stains can be way off from the charts due to application and different additives in different slabs of concrete.