And sorry i forgot to add, if i have the catalogue on the SSD does it eat up a lot of space?
This is a very vague question, the catalog takes up the space that its going to take up. This depends on a huge amount of factors, and it is unlikely I could tell you in advance how much space it will take up, nor could I say if that amount of space is what you consider to be "a lot of space". How large is your SSD?