Which Machine on Paperspace?

It seems like Paperspace changed their pricing structure since when the fast.ai videos were created.
For storage, is 50gb enough to go through all the part 1 and 2 lessons?
Or, can I start with 50gb and swap with bigger storage later?
Also I read some threads saying that GPU+ isn’t enough to go through all the lessons. Is p4000 good enough to do that? It seems like gpu+ and p4000 have the same price.
Or, should I get p5000?
Thank you so much!