Oil and Excess Pressure in fuel

[HAULNTX]

Possibly the wrong place to ask this question if it needs to be moved please let me know.

My question is how much does it take to purchase a laptop, inline 5, 6, or 7, and cummins insite?

I have a 870, 871 and an isx12 which is a 2014, (not sure on the number or that one).

From what I'm seeing $300 on up for a laptop, Inline 6 seems to run around $300, and Insite from what I've seen is $1500.

Is there a less expensive insite that I'm not seeing or where should I look for that?

Eventually I would like to be able to demandate my own trucks and I know I will be sending a copy of the one that is already done as I'm pretty sure its complete trash.