185 Trees. Sounds like you planted a jungle.
No kidding our last home had about that many one an acre lot. It was really nice. I hope you got them wholesale, or better. Around here a cheap tree about 2" diameter is $75.00 and up.
We planted 85 red tips along one side of the property. They are planted three feet apart as we want a green fence in that area. They look really great, and all survived but one. It took three days to plant them after we dug the holes. Fortunantly we dug the holes with the Bobcat and a 24" auger. It only took one hour to dig every single hole.
Remember with new trees the sprinkler system most often will not put out enough water for them to survive in the dead of summer. Depending on how hot it gets and rainfall, ect.
I have also seem people drown trees by to much water as well. It is a delicate balance for a while, when they are new.
As for the bark controller. That is a good price if it is the same model. I have seem some realy cheap ones, quality wise.
www.ultimatebarkcontrol.com
And no this is not my website. I don't even know the people.