Just put in a ground mount off-grid setup to power a dewatering system on one of our fields. The technology certainly continues to improve and some parts of the cost are decreasing as well. Tax credit is decreasing, but ~25% is still better than a kick in the leg. That includes all of the setup, I'm told. Know some farmers that are putting up pole barns with panels on the roof or attached as well as housing the equipment and being able to include portions of the building cost in the figures. Definitely worth checking into further depending on your situation.
If you are not doing batteries and stuff, the panels themselves are not biggest cost and the racking can be 2x6 and 4x6 lumber.
Also I've heard, but it's internet gossip, that some utilities are not as eager to add grid tied systems any longer, or at least not to pay for the juice. Still, if you are using your own power, it can at least reduce your bill.
Am involved with a 10 panel array that is grid tied with solaredge equipment at another site. No deals with the utility company, but this setup is just a blip on the power for that facility (more of a demonstration setup). Neat to watch the power production on the web as the sunlight and clouds come and go. 10 x 300w panels producing a bit over 20KW/day this week.