I am looking for information on Getting a Mortgage. I am a sole parent, currently earn $536. a week from work with the possibility of doing more hours. $200 a week from my ex husband as child support, and get family tax benefit part a + B. (about another $215 a week. I am eligible for the 1st home buyers grant and have about 10,000 at the moment, combination of tax return and savings. house costs i would be looking at would be between 250,000 and 350,000.