Let me back you way up, are you quitting your job at the plant? Because how are you going to mow lawn if you are spending 13 hours a day, 5 days a week at the plant?
Definitely get COMMERCIAL equipment, but get yourself a walkbehind. You are in Texas, so if your cutting wide open areas I would understand the need for a ZTR.
There is an Old Blue Chair for each and every one of us, we just have to find it.
2006 GMC Sierra 2500hd crew cab
BOSS 8'2" Power V
Hustler X-one 60"
Toro Proline 36" wb w/t-bar controls
Shindaiwa T254, Echo trimmers, chainsaws, pole hedge trimmer, pole saw, hedge trimmer
Shindaiwa 633 and Echo 760LN