No. It hasn't done either of these on the state level in states where it has been legalized. Although many same-sex married couples will pay less federal income tax when the federal government begins to recognize same-sex marriage, the reduction in tax revenue is not large enough to create a need to increase the tax rate for everyone to compensate for it.
As for entitlement programs, marriage in general does not generally increase government spending in that area. Many entitlement programs have eligibility criteria that will actually eliminate more gay people when their marriages are recognized on the federal level and their spouses' income will be counted when determining eligibility. Benefits for married couples are not greater, and in fact are sometimes less, then the benefit for the same two people when they are considered as single individuals.
The process of legalization after marriage without a lawyer involves getting a Green Card for those based in the US.
As of October 13, 2014, there are no further obstacles to the legalization of same-sex marriage in Alaska.
As of October 17, 2104, there are no further obstacles to the legalization of same-sex marriage in Arizona.
As of November 19, 2014, there are no remaining obstacles to the legalization of same-sex marriage in Montana.
As of October 6, 2014, there are no further obstacles to the legalization of same-sex marriage in Wisconsin.
As of December 20, 2013, there are no further obstacles to the legalization of same-sex marriage in the state of Utah.
They support the legalization of same-sex marriage. In Mexico City it is legal now.
As of October 6, 2014, there are no longer any obstacles to the legalization of same-sex marriage in Colorado.
As of October 10, 2014, there are no longer any obstacles to the legalization of same-sex marriage in Idaho.
As of October 6, 2014, there are no longer any obstacles to the legalization of same-sex marriage in Indiana.
As of October 7, 2014, there are no longer any obstacles to the legalization of same-sex marriage in Nevada.
As of October 6, 2014, there are no longer any obstacles to the legalization of same-sex marriage in Oklahoma.