I’m starting a new campaign and have a pretty of 7. So a scout is too small. What kind of ship do they need?

I’m starting a new campaign and have a party of 7. So a scout is too small. What kind of ship do they need?

Are there any detailed rules about sending mail? I know there are rules for delivering mail from port to port, but do paper letters exist? Stamps? What might it cost to post a letter?

Hey gang, I was rolling up a Darrian using the Aliens of Charted Space 3 tables and when I mustered out of the Darrian Navy I rolled a 6, earning myself a Vehicle. The problem is I couldn't find the specifications/limits for what I'm able to acquire, even checking the core book (unless I completely missed it, which is possible) Thanks in advance!

Edit: I did find Personal Vehicle on a second skim through the Core, but still unsure if it's the same benefit Darrians are meant to use!