You fail to understand the definition of a gift that would be considered separate property. Something purchased with YOUR MONEY, which you earned during your marriage, is not going to fall under that definition no matter who's name it was purchased under or how many times the title is transferred. And attempting a stunt like this is going to end up getting you nabbed for fraud and attempting to hide assets. Doing THAT is going to make the judge deal with you a heck of a lot more harshly when he makes his final ruling. Again, I urge you to have your lawyer explain to you EXPLICITLY why you should not do this, and why there is no legal way to hide assets subject to division as community property.
If you are insisting on buying this property, just accept the fact that your wife will be entitled to half.