Do you have the preconcieved misconseption that all you have to do is mix water and seed in a machine and spray it on the ground and it will grow? If so, chances of your success is slim to none.
On the other hand, if you have some turfgrass knowledge about what it takes to grow grass and you are willing to invest some time in learning some of the proper procedures, then hydroseeding can be a stand alone business that you can make a good living at. For a forum that is dedicated to the hydroseeding industry go here. hydroseeding.org/forum/ , just add the www"s