As someone who experienced this myself earlier this year.
I went to The Producers Conference at MOS and James from Freemasons gave out the file he was demo-ing.
Rushed home, downloaded it and when i clicked play....I got told my machine was too slow. Even on the most generous settings. It was a 3 year old Macbook Core2Duo, with 4GB of RAM.
There was no more I could do to make that machine any better. So I sold it and bought a 15 MBP... The same project didn't touch 10% of the system resources.
I would definitely try a new machine rather then attempting to make do with an SSD.