You can make that...
IF you have the years of experience and reputation and
IF you are a one-man shop and can wangle contracts on your own.
My company is charging me out for $60 on our current contract. Other companies in the area are charging callout rates of up to $125. Even with that, the tech is either making a fraction of that rate, or is on salary.
I have 20+ years experience, and the reputation. I don't have contracts lined up at the door to keep me in meat and taters for years to come, thus I am working for someone who can keep a trickle of work coming my way, and I don't have to worry about insurance, taxes, and business expenses, mostly. That's the situation I suspect most of us are in.
The highest paying PLC jobs right now are contracting overseas, if you can get one of those, and if it's your thing. A PLC programmer who gets paid $65 an hour won't be home every night, either. Probably not many nights.
Oh, and the $65-125 they brag about is definitely not in the ballpark for just out of PLC school!