Yes it does go away and is replaced with the sensation of "Oh God here we go again, another day with the monotonous repetition that is trench digging"
Did one today, 180 meters of mixed soil, from lovely loamy stuff to dirty rock filled junk.
Main thing is to keep it straight, upright and at the right depth. Use a reference point on your dipper arm to set your depth. Basically extend your bucket to full, have the dipper arm straight up, put the arm on the ground and use a tape measure to find a spot on the arm/bucket where 3 foot is, then every now and then put the arm into the trench like that to check your depth (you can even use a bit of marker paint to mark 3 foot).
Keeping a trench straight is a bit harder if you are not working next to a reference line but it is advised to mark it out beforehand. Unfortunately today I was having to work off center and drifted a couple of times, keep checking your work and if it is not perfect give the customer a discount for imperfection.
If the machine is level the trench will be level but today my job was on undulating ground so I spend half an hour with a bigger bucket leveling my run as best I could without taking forever to do it.
Not sure what you mean by "funding the job"? Could you clarify that?
It took me 10 hours of digging to do 180 meters to a depth of 600mm with a 1.6 tonne Kubota, using a 200mm trenching bucket fitted with new tiger teeth. One of those jobs where a 3 tonne machine would have been better to deal with the tough digging conditions.
BTW I am assuming you know all this but wrote it for others that may be thinking about trenching.
Best of luck mate.