I would advice against that Ace, paying a guy to level you to 50. End game is nothing new. Dungeon grind for gear, then raid grind for more gear. Currently there are 7 hardmode flashpoints, swtor's version of heroic dungeons and 3 level 50 flashpoints. They are adding another one this month so around 8 instances to run at 50. The only thing different about swtor instances is that in some of them, depending on choices made during cutscenes, you go different paths and face different bosses. Otherwise the actual fights are pretty simple. Mostly tank and spank, sometimes with adds and aoe. That's about it. And bioware seems to love boss enrage. So if you bring in a group of dps in greens, you will wipe if you can't kill the boss in time.
The raids I've not experienced yet. Raid size is either 8 or 16 man. Only difference being the amount of loot that drops, quality of loot is the same. There are currently two end game raids. Each raid comes in 3 difficulty level. So you get to grind the same fights x3. From what I hear, it's more of the same. Again, heavy use of boss enrage mechanic.
The other endgame would be the pvp grind for pvp gear, aka warzone grinding. Swtor has 3 warzones, their version of battlegrounds. Only thing different about swtor warzones is huttball. This particular warzone is neutral, meaning you can get matched to fight same faction. It's capture the flag with a twist. The twist being you can pass the flag to other players. It can be quite fun, hutball, but currently it's a jedi/sith playground with all the force speed, jumps, pulls etc. The rest of the classes are left twiddling their thumbs or fighting aimlessly in mid ignoring the game. It's all force users, stringing force powers to blitz across the map.
There is an endgame world pvp zone but it's empty most of the time. Reason I stated above. Bioware is promising to fix this zone so people will actually fight instead of just flipping objectives and trading control, avoiding fights at all cost.
There is one more endgame, kinda. Gearing your companions. You get 6 companions at 50, 5 + a droid. So yeah if you're so inclined, it will take awhile to deck out your posse. Although at endgame, there's no real reason to do this since you will rarely use them anymore. Expect maybe when you are farming stuff.
So if you skip the leveling content, I'm guessing you will get bored fast. I guess you can always roll alts, to see the other stories.
@Viscious
No don't avoid space combat. Do the dailies, they are a great source of xp and credits while leveling. The space station bug they already fixed. The blasters not working bug is not widespread. In my guild of 30+ active players, only 2 of us have this bug. It was introduced in one of the recent patches, so if it's not affecting you now, you probably won't get it.