Best guess assuming $400.00 per pump:
NOTE: this does not include employee labor cost, insurance, etc, etc...

30 class eight injection pumps every 24 hours, times five days
x260 working days per year
-----
=7800 injection pumps per year

78000 injection pumps per year
x400 assuming a minimum of $400.00 per pump
-----
=3,120,000.00
Business income taxed at a rate of 4.95%

$3,120,000.00
- 4.95%
---------
=2,965,560.00

subtract $38,000 per machine for calibration every six months = $304,000.00
Subtract $140,000 for basic maintenance.

2,965,560.00
184,000.00
- 160,000.00
-------------
= 2,621,560.00

Subtract $225,000.00 for emergency machine repair every year.

2,621,560.00
- 225,000.00
-------------
=2,396,560.00

Now subtract for one machine scheduled for replacement or total rebuild each year.
Union labor to remove/install the machine $60,000.00
Rebuild/replacement five year average $480,000.00
Transport/shipping $7,000.00

2,396,560.00
480,000.00
60,000.00
- 7,000.00
-------------
=1,849,560.00

Again NOTE: this does not include employee labor cost, insurance, etc, etc...

If nothing goes wrong, goes wrong, goes wrong!

Property tax rate: $67.97 per $1000 of assessed value.
Michigan Tax Index 34.541
Firms with apportioned gross receipts under $350,000 are exempt from the Michigan Business Tax
https://treas-secure.state.mi.us/MBTEstimator/MBTEstimator-start.asp

New Michigan Business Tax has few winners: Some report paying 4 times more than before SBT repeal
http://blog.mlive.com/annarbornews/2008/07/it_was_supposed_to_make.html