Focus on your core activity and save money.
VAs are good if you can devote initial hours and train as per your need.
Are you looking for one? I can suggest few top resources, who can do FREE trial as well.
Yes but you need to spend a fair amount of time in person so that you'll be effective together.
"Date" online for the co-founder but once you've found a likely partner, spend time together to make sure it's a good fit.
Here's a system a masterminded with Joel of Buffer (pun intended).
General rules: Break the session into 3 parts and set time limits. Stick to one mastermind group partner for each session. Take it in turns for each part of the session.
Prep: Have your achievements and challenges list ready ...