Florida Statute 61.08 sets out the rules in alimony determinations in the State of Florida and it indicates the following:
If the court finds that a party has a need for alimony or maintenance and that the other party has the ability to pay alimony or maintenance, then in determining the proper type and amount of alimony or maintenance under subsections (5)-(8), the court shall consider all relevant factors, including, but not limited to:
(a) The standard of living established during the marriage
(b) The duration of the marriage.
(c) The age and the physical and emotional condition of each party.
(d) The financial resources of each party, including the nonmarital and the marital assets and liabilities distributed to each.
(e) The earning capacities, educational levels, vocational skills, and employability of the parties and, when applicable, the time necessary for either party to acquire sufficient education or training to enable such party to find appropriate employment.
(f) The contribution of each party to the marriage, including, but not limited to, services rendered in homemaking, child care, education, and career building of the other party.
(g) The responsibilities each party will have with regard to any minor children they have in common.
(h) The tax treatment and consequences to both parties of any alimony award, including the designation of all or a portion of the payment as a nontaxable, nondeductible payment.
(i) All sources of income available to either party, including income available to either party through investments of any asset held by that party.
(j) Any other factor necessary to do equity and justice between the parties.
First the court needs to determine a need for the alimony. You will of course argue that there is no such need because she is voluntarily unemployed and has even told you that there is no incentive for her to find work because she will just be paid alimony. If you lose this round and the court determines that there is a need then you should consider arguing that she is perfectly employable and that pursuant to Florida Statute 61.08(2)(e) the court must consider the "employability of the parties." Because she is employable, she should not be awarded alimony.
Keep in mind that the Judge has wide discretion in whether or not to award any alimony and, if any is awarded, how much to award. As long as you can show the Judge that she is not seeking employment then you can decrease potential alimony in that way. You should point out that she is not mentally or physically disabled, so she CAN work, and that she hasn't applied to any jobs recently. In this way you can decrease potential alimony liability.
I hope this has helped and I wish you all the best!