You can withdraw the contributions you made to Roth IRA tax free. Any withdrawals from Roth IRA count first towards the contributions, then conversions, and only then towards the gains which are taxable.
You can also withdraw up to $10000 of the taxable portion penalty free (from either the Traditional IRA or the Roth IRA, or the combination of both) if it is applied towards the purchase of your first primary residence (i.e.: you don't own a place yet, and you're buying your first home, which will become your primary residence).
That said, however, I cannot see how you can buy a $250K house. You didn't say anything about your income, but just the cash needed for the down-payment will essentially leave you naked and broke. Consider what happens if you have an emergency, out of a job for a couple of months, or something else of that kind.
It is generally advised to have enough cash liquid savings to keep you afloat for at least half a year (including mortgage payments, necessities and whatever expenses you need to spend to get back on track - job searching, medical, moving, etc). It doesn't look like you're anywhere near that.
Remember, many bankruptcies are happening because of the cash-flow problem, not the actual ability to repay debts on the long run.