No, repeal requires a a 2/3'rds supermajority to override a veto. It would be sufficient to defund Obamacare for 2 years till we can get 60+ senators and a Republican president to sign a repeal bill.
You try the complete repeal once.
Then you go after the individual little pieces of the whole of 0bamacare - those things that are easily explainable and are blatantly anti-freedom.
Make the dems fillibuster and/or 0bama veto the repeal of something that is obviously anti-freedom.