you be cheating man
having the pro come do it
Bro their work is pretty easy. For liquid spray, they just pull this long hose and walk around spraying the whole lawn.
If they do pellets, they have a rider, kind of like a Segway, that they ride and it sprays pellets all over the grass.
It takes me much longer to do the same work, plus cost of equipment and supplies. And I have to remember when to apply.
They come out 5 times a year on schedule. Do the cost analysis, it might be cheaper for you to hire too.