$42/hr * ~1980 work hours in a year = $83,160
The caveat here is being a technology consultant is relative to the types of technology problems you're consulting for. Tech Conusltants can much more so today be generalists without much depth in a particular tech skill as the average geek might define. Ie., get your company setup in the cloud using basic cloud services. As a result I do see this position opening up to technically inclined folks in general.
A rule of thumb I've found that can be accurate is you should/can charge about $10/hr for every year of experience you have, and should be working for clients or employers that see value in paying for that kind of experience. At some point that might transition from being an employee to a contractor, and ultimately a consultant.
The lower the hanging fruit, the more the rates lower. Focusing less on technology, and more on business strategy which uses technology as a tool has helped keep my rate fair, and high enough to do quality work.