What is a concrete footer?

Depending on what part of the country you live in. In the south they are to be 2 foot deep, most generally it is 3' deep and extreme north 4' deep.

It depends on the width and depth of the footer. Width x Length x Depth in feet divided by 27 = cu. yds.

Pumps consist basically of pressure vessels and equipments for supplying compressed air. Concrete is delivered in to the pressure vessel and the vessel sealed tightly. Compressed air is then...

I assume you are talking about anchor bolts for securing walls and or equipment. Most masonry or carpentry contractors can perform this job. It can also be done DIY, but requires a masonry drill bit...

27 cubic feet