For reference, this is almost always what I do as Austria in gunboat. I'm going to assume the nice circumstance where Italy doesn't attack.
S01: Southern Hedgehog
A01: Vienna -> Galicia, Trieste -> Albania, Serbia -> Bulgaria (!)
The key part is that most of the time, if Austria doesn't move to Albania in S01, Turkey will go for Greece in the fall. You punish him for it by isolating that army in Greece while getting to Albania in the fall. Build army Budapest.
S01: Budapest support Vienna to Galicia, Serbia support Albania to Greece
At this point, you are probably in Galicia. There's no guarantee, of course, and it's not rare for Russia to try to run a Juggernaut in S02, but considering that this requires Russia to use its (likely) one build on an army Warsaw to use against Austria, and requires a pliable Turkey, those don't combine often enough to make Austrian ownership of Galicia after S02 here improbable.
And unless Turkey is crafty and supports himself out of Greece to Bulgaria, you're in Greece and Turkey is down an army. Sometimes Turkey has F AES, A Bul; rarely does it have the above and F BLS; and it's not uncommon to see just A Bul, the result of bounces in Black Sea and Eastern Mediterranean. If you see that last one, Bulgaria's yours. Regardless, you've got a decent shot at Rumania.
So that's 2 builds in W02. Russia's not getting anywhere on you, Turkey's stuck forever, Italy is probably stuck at four and having trouble getting into Turkey. At this juncture you should squeeze out that crucial second fleet. Couple it with A Budapest so that Italy doesn't freak as much; if Italy hasn't attacked you yet and he's not crusading by now, he's probably switching to attack France. Seeing F Tri/A Vie will make him switch to attack you. A Bud has plausible use against Rumania, and doesn't look like a likely candidate to go to Trieste and attack Venice. A Vie has much less force projection east - and the subtlety behind the fact that it is physically located further west will affect Italian players, even though it's equidistant from Venice compared to Budapest. I know that sounds silly, but it really does. Build A Bud and Italy is much more likely to see F Tri as anti-Turkish; build A Vie and it suddenly looks like Vie -> Tri -> ADS is your game plan. So get your second fleet here, let Italy break off to fight France, and slide your fleets over to KO Turkey.
Going off of the timing comment, I'd say as a general rule that you should use your build from Bulgaria as an anti-Turkish fleet. If you've got Bulgaria and Russia hasn't gone full retard, then Turkey's at 3 units, bottled up in Anatolia, waiting for two coordinated Mediterranean fleets to annihilate its position. You've got one such fleet already, likely in Greece or Aegean Sea. Build the second and go to town.
As for the north - you probably want to get to Russia first, simply because it's such bait for Germany or even England in an E-F, and it's easier to hold from the north than Germany. Plus, once you get Sevastopol, you can backdoor into Armenia and finish off Turkey if its defense is particularly tenacious. The builds from Russia can go toward getting Germany. And once you're in Germany, you've got the win - Italy should not be able to challenge you and the builds from Berlin and Munich coupled with units moving west from finally having KOed Turkey are ready to push into the decisive centers.
Some variations:
*RT war. Great! Hit them both. If they're fighting, take advantage of the added entanglement.
*FI war. Great! You'll have a tougher time with Turkey if there's not also an RT war (though these seem to go hand-in-hand for some reason), but you can hold them off long enough to stalemate them out and get one or the other to switch sides - usually Turkey stabbing Russia, because Turkey's got to expand quick to have a chance to win, and Russia has a chance of expanding elsewhere with an ART stalemate in the south. If FI and RT fight, you have no excuse for not succeeding.
*GE team up. Bad news is, your shot at a win is really iffy. There will be an EG stab, but the question is whether you can capitalize enough to get Berlin, Munich, Warsaw AND Moscow. Get them all and you're golden, miss any and you've lost your solo. Good news is that you won't be facing a Juggernaut, and a GE team up probably means Turkey hits Russia, giving you that sweet RT war from before.
*EF alliance. Russia still gets ripped in the north, just not as quickly, but Russia might divert troops to Germany instead of you, so that's a plus. FI war happens, so that's questionably good or bad, see its section.
*Russia gets Sweden. If Russia gets Rumania then this is probably irrelevant because Russia usually puts a second 01 build in St. Petersburg. If it doesn't, you bitch at Germany and grit your teeth, but carry on as planned because a 5-center Russia in 02 still isn't a big deal.