It really is not that difficult if you have the time, although I may have had it easier because my yard already had a decent slop so not much prep was really needed. The manufacturer reviewed my yard and all that was recommended was killing off all the vegetation underneath, spread fabric, put 3-4" of DG down, and then lay the turf. I did put in some additional drainage where the walking path was going to be since I was grading the yard back toward the walking path. For the putting green I installed, I also brought in some mason sand to fill in all the micro pits in the DG to ensure a truly uniform surface. Its been almost three years now since the install was finished and have had no issues with turf movement or drainage.
Before (Really "in progress". Forgot to take a true "before" pic before I tore out our deck)


Yard prep

Putting green prep

Turf pick-up

Yard turf install (two nights)


Finished install


The yard turf came from turf factory direct. They do not charge taxes on all out of state purchases so even with freight it was still cheaper than buying locally. The putting turf came from PurchaseGreen. They sell remnants and this area was small enough that the turf was less than $2/sf. Since my labor is "free", the finished costs was just over $4/sf.