They can have that right now; just go get a lawyer and have it drawn up.
Yes, but not for $20--$50. Marriage is a common contract, and as such it is used in a number of areas, from inheritance, to banking, to hospital admissions and insurance.
I see no reason to deny Gays and Lesbians from a similar civil contract, specifically tailored to meet the needs of those groups. And the needs do vary quite a bit because they are very unlikely to have children. I would even support a two stage civil marriage system based on the existence of progeny. You are "Civil Unioned" before the law when you have no children, No Fault Divorce laws are in effect, etc. Once you have children, we go old school - proof of wrong doing would be required to get a divorce, and the party who broke the contract forfeits any joint property and custody if the wronged spouse wishes it.
Such arguments for the gay "right" to marry always fall on the mechanical side, i.e. it's a legal contract, period, and religion and the sanctity of marriage, the human and sociological elements, do not belong in the debate. This, however, is instantly contradicted the minute "love" is brought into the argument because even gayz will tell you of their desires for commitment and family thus dragging those elements right back into the conversation.
That is because there are in effect, two contracts. The first is the civil contract, which determines how the laws will treat your union. As stated above I feel its a bit discriminatory that one union is singled out to be recognized by the state while others are denied the ability to form and have a short form contract at low cost.
The second is a societal contract. We take vows in front of our friends, family, congregation and God as the second, sacred, and to most people, more important compact. In our ceremony, our guests also took a vow to do what was required to support us in our Marriage, to give us good council, and to help us keep the vows we made to each other that day. But that agreement is implicit- the sacredness of the second, spiritual contract can only be kept that way if we all keep to the tenants of that contract - being faithful, helpful, and loving to our spouse and children, and help others do the same.
Its this second compact that gays and lesbians wish to force access to, thinking that if they can get you to call it Marriage, that they can gain the acceptance and support of the community, even when others feel that their union is a Sin before the eyes of God.
Of course there is nothing preventing gays from having their own spiritual ceremony, finding "Christian" congregations that support their unions, and obtaining that same promise to support them from friends and family. However, that isn't enough. And neither would having the civil government arrangements I suggest above. Because this isn't about having the same convenient short form legal contract, and this isn't about having a community of people who will support them in their union. This is about trying to make people who think homosexuality is sinful tow their Politically correct line and
force people to say that they approve in public , when they don't, never will, and shouldn't have to do any such thing.