University of Georgia turf grass center Tifton GA.
Web link below. I called them a couple times. Very helpful.
http://extension.uga.edu/topic-areas/field-crop-forage-turfgrass-production/turfgrass.html
Agree with above. Get the best you can afford. Cheap tools make work harder as they aren’t as accurate or robust. Will cause excessive work and not be as satisfying for the user. Having space to work to work is a huge plus.