Well i would say wall but you can always bamboo but if you decide to bamboo make 3-4 marines or you will die to early dragoon, anyways build order here
9 - depot
10 - rax
12 - gas
16 - factory
when factory goes up make depot asap so you can continue scv production
18 - next factory
ok here is the fun part, your first factory should be about done right now, what you want to do is upgrade the vulture speed and make a lone vulture, put up another depot and add an add on to your next factory, this factory will be making your mines so upgrade that as fast as possible.. make 3-4 vultures try to get in the toss base, if they've walled it's safe to put up a command center, mine up his front while upgrading seige ability and getting an ebay then you can pump tanks/vultures to your hearts content.
things to watch out for while going fast expo vultures
1 gate robo goons
1 gate reaver tech
safe builds to vs
2 gate goons into robo
1 gate fast expo
1 gate Dt tech into 2 gate ( 2 mines will deal with Dt's untill you get an ebay up.)