You can load the software on another computer. Do input and everything except print and efile on the 2nd machine. Transfer the file (via flash drive,etc) to the main computer to be printed and efiled.
This used to be known as "sneaker network", i.e. I copy to my floppy disk, put on on my sneakers, run down the hall with the floppy disk and put that floppy in the main computer to be finalized.
That is what we do now. Couldn't bring myself to pay $500 for the privilege of concurrent use 5-10 times per year. Oh well, it is almost over and there is always next year. I guess if I go for it early enough, it would dull the pain. LOL.