Getting 500GB storage should set you for a while. It grows but not as fast as you think it does, and i dont expect for it to get up to 500GB that fast, however once it reaches, say 300GB, you probably want to upgrade storage to 1TB to be safe, but again i dont expect for the blockchain to become that big in a short amount of time. Electrum is a good option too, and you should look into it.
Probably, but I just don't want to be stuck in the future on a difficult enviroment because of an unhappy choice at the start.
I'm making some research. Thank you all.
If other have some advice I'll be listening and when my research will be complete I'll write my solution here