No. You are not being unfair.
Allowing sale of the residence and giving her the equity as help to buy you out is beyond generous.
I take it that the state in which you live provides for sharing of military retirement but you shouldn't have to pay for the privilege of splitting the annuity in terms of IRS penalties and prepayments. If it was me I would gather all of my tax returns since the separation, every check made payable to her, and see a good tax accountant. Your cancelled checks are proof of payment and might be as good as a form 1099. See the accountant and save your hide.
Get all of the legal stuff done and tell your lawyer that you don't feel that a retainer of $7,500 is fair, that is, unless your lawyer charges $750 an hour. Cover yourself because if you don't you'll get skinned alive.
Eliminate luck by making a plan.
Wing Walker
Flew Over That Mess Myself