I've been using one of these for decades!
Sadly, modern cars often have no access to the starter anymore.
But modern cars often have a starter relay in the electrical junction box and with a couple of .250 spades you can get it done.
I have turned engines over via "in gear" and push the whole car but I've not turned one via the lock one wheel and turn the other wheel.
It should work fine!
I have found that if you have a vehicle that you cannot push by hand most of the time you CAN move it by rotating on the tire instead of pushing on the body.
I have moved 1-ton duallies around by myself using the "rotate the tires" trick.
For turning engines, once you've used a bump starter you never go back...
The one Greg linked to is decent and budget friendly.
I think I paid the same amount 30+ years ago!