[Help-glpk] A financial optimization problem

[Reginald Beardsley]

Can someone point me to information on how to setup the following optimization 
problem?  It seems to me a not unusual problem and there are a lot of smart 
people who follow this list.

I'm interested in buying an income producing property.  I currently have the 
purchase price in an IRA from which I can withdraw money w/o penalty.  However, 
I will have to pay income tax on what I withdraw.

An option would be to borrow money and then withdraw money from the IRA to pay 
off the loan.

Given:

current income
rental income from acquired property
tax rate schedule
withdrawal rate
interest rate
repayment schedule

Minimize:

sum of tax & debt service

Thanks,
Reg