Unless you work on a company or university which can purchase the hardware/software, your best bet is to find the lowest cost alternative in the area where you live.
Once that you learn the essentials of PLC programming, jumping to a different company is simple; just learning their particular software tools.
In my day SCADA had not been invented yet, so I had to invent my own protocol, at every layer of the OSI model. I did this for nuclear inspection robotics in the 70's and NASA type rocket launcher with 200 channels.