I think we need to come back to reality with this Billion Dollar article. To begin with it's only someone blog and he is using the article so he can sell his Lawn Care Business guide and software package. Below is where all the money goes.
As defined in this study, the five sectors comprising the U.S. turf-grass industry in 2002 generated total output (revenue) impacts of  $57.9 billion (Bn), employment impacts of 822,849 jobs, value added  impacts of $35.1 Bn, labor income of $23.0 Bn, and $2.4 Bn in indirect  business taxes to local and state governments. If these values are  expressed in 2005 dollars, the total output impact was $62.2 Bn and the  total value added impact was $37.7 Bn. The value added impact represents  total personal and business net income. 
Among individual  sectors, sod producers created nearly $1.8 Bn in output impacts, $1.3 Bn  in value added, and 17,028 jobs. Lawn equipment manufacturers  contributed $8.0 Bn in output, $2.5 Bn in value added, and supported  nearly 34,000 jobs. The lawn care goods retailing sector produced $9.1 Bn  in output impacts, contributed $5.8 Bn in value added, and sustained  114,294 jobs. The lawncare services sector generated nearly $19.8 Bn in  output impacts, $13.3 Bn in value added, and 295,841 jobs. Golf courses  had $23.3 Bn in output impacts, $14.5 Bn in value added, and 361,690  jobs.
Economic impacts were summarized for individual states and  seven geographic regions of the United States, with the turf grass and  lawn care industry having significant activity in all areas of the United  States. The top ten individual states in terms of employment impacts  were California (101,022 jobs), Florida (83,944), Texas (52,784), Ohio  (33,154), Illinois (31,625), Pennsylvania (30,845), North Carolina  (28,860), Georgia (27,327), South Carolina (25,083), and New York  (23,965). Regionally, the Southeast was the largest in terms of  employment impacts (197,711 jobs), followed by the East-Central  (159,358), Western Coastal (130,862), South-Central (112,284),  North-Central (100,738), Western-Interior (64,226), and Northeast  (57,671).