Maybe just not using the right key words-terms. I think i get what you mean. And if i am right, i would recommend having some one come and till the lawn, and maybe a few other passes with other implements if necessary, and then use a bed shaper on contour. This would make a lot of otherwise time consuming work, fast, and then easily maintained by hand for years to come, with much smaller human powered, wheel hoes, tillers and etcetera. Just make sure if you go this route, your contours are on spot, and that you have plenty of foot path and working room. If you can work fast
enough to pick up flags, and stick them back down, i would mark contour before any work is done, and insist the soil be worked on contour, start to finish just keep the flags out of the way, or paint lines on the ground. This is done all the time. Most larger organic farms use this method, but tighter and less garden like.
Is this what your thinking?
http://www.provisionspermaculture.com/uploads/1/1/1/5/11159992/9608110_orig.jpg
And here is a resource for organic farms in utah, who may or maynot rent
tractor time, or at least point you in the right direction
http://www.farmerspal.com/organic-farms/region/utah/page/1/