I'm only a few miles from you and you guys get way more hail then we do. I can only imagine what your hail insurance premiums are, mine are between $9 and $13 an acre for $100 worth of coverage. With your off-farm work schedule, be prepared to spend some on custom applications like fertilizer and spraying. Last year was tough for everybody to get in, but from what I've seen, everybody and his dog was putting N down last fall, so the workload this spring should be a little less for the custom guys. The benefits of getting applications done on time will more than pay for the expense of hiring it done if you are not around.
I'll throw my hat in the ring as far as inputs:
1. Soil Test. It's not too late and it pays everytime.
2. Seed Test. Send a sample of your clean seed to the state seed dept for seed count and germ. Cost is $26 for a sample and it will give you seeds per pound. I plant 1.4 million plants per acre.
3. Your soil test will show in central ND that you are high in residual P & K, but you still need to put some on. Most guys will go with 50lbs of 11-52 or if your buying from Harvest States, you will have to use their MicroEssentials product, I generally put on 65 to 90lbs in furrow.
4. Nitrogen. Apply in the spring, and I don't think you will have much residual in the soil from last year. With the unbelievable amount of rain, most of it leached. I figure on 2.5lbs of N for every bushel of yield goal. I would plan on applying 125lbs of actual N and that equates to about 250lbs of Urea/acre.
5. Weed control. IMHO your sprayer is your most important piece of equipment. You may make seven trips across the field with it in a season. At least one burndown app, then early post-emerge for wild oat and tan spot, then maybe a second app for tan spot and second flush of foxtail and broadleaf. Then a fourth app for late season fungicide and perhaps more N. Then a few weeks later another fungicide app for head disease. Then after harvest another burndown. Then before freezup, another app for perenial weed control. I hope you have a nice sprayer and time to use it.
It's expensive to get those yields, but if you have an understanding banker, they will give you the money to get it done. You may want to quit your day job though