Joshua hit the nail pretty much on the head. The answer to the question is how much can you afford....
I will go out on a limb here and say that you want a mortgage around 600-800/month. Since insurance and taxes are pretty low in upstate SC and rates are ridicuously low right now, let's use this example:
$97,650 mortgage + UMIP ($1,464.75)
$99,114.75 total mortgage @ 5.5% rate
$562.76 (principal & Intertest)
$41.30 (monthly mortgage insurance)
$100 (rough estimate for taxes and insurance)
$704.06 Total Mortgage Payment
Keep in mind that even if you feel you can afford more, most underwriters will see that you do not have much in disposable income each month so they will probably be more discerning about how much of a payment they want you to have.
If you have any questions, please give me a call. I am right across the border in Asheville, NC.
Have a great day