JAR - 8/23/2020 21:39
You answered your question when you included the following in your post.
"He can switch fields on Integra." If you want something less expensive than an Integra get a Versa. It has the same interface a your Integra.
You don't want an Edge. The interface is different than your Integra and won't work with OnTrac3.
Also look hard at purchasing a used 6500 or 7500. Both can be upgraded to RTK if need. I think both might have a low cost subscription service available that is much better than WAAS. Please check on that because I am not sure.
Good luck!!
Jay