The "Cost Analysis" page at fieldturf.com has a comparison between the installation and maintenance costs of natural grass and fieldturf. According to the numbers shown on that page, base preparation and material costs combined for fieldturf are $700,000. The chart doesn't specifically state that labor costs are included in that, but let's imagine that they are. They show maintenance costs for fieldturf as $5,000 per year over the ten year life of the field. So, it looks like the grand total price tag for installation and maintenance over the average lifespan of a fieldturf surface is $750,000.
It should be stressed that fieldturf states that prices will vary per region, and with the amount of field usage. It looks like the big advantage of fieldturf is in average cost per hour of use, over a ten-year period. According to fieldturf's site, that cost is $91 for natural grass, versus $25 for fieldturf.
http://www.fieldturf.com/en/fieldturf-difference/cost-analysis
Oh - and my guess would be, "Grooming machine not included."