I bought Squad but was very disappointed with the fact that they do not support joy sticks yet, so forget about flying in squad unless you are a keyboard/mouse pilot.
You definitely need a PC that has enough grunt to play the game, which I do now but you'll also need to get familiar with the key bindings its a bit different to PR but not overly complicated like ARMA.
Once the =VG= community gets a Squad player base together that really wants to play Squad it might be worth organizing a dedicated server, but I don't see that happening very quickly. I could be wrong but I've been waiting a long time for Squad to take off and it hasn't.
Currently we have an ARMA server (2 in fact) that are not being used very much so adding another one for squad would be a waste of money with the interest levels as they are.
Like any game its not so much the mechanics of the game that hold the player base it depends on the server population.
I've been playing ARMA recently but again we don't have enough players to make it anything like the team work we enjoy in PR, not even close, so in my opinion Squad suffers from the same problem.
I've played on other servers but that is not much fun because I don't know anyone on those servers and its just not the same as playing with your VG mates.
So good luck with Squad and call me when you have a player base.