Conventional Loan qualification to purchasing home

[Mohan Dag]

It is my first investment property purchase contract for a duplex. I am looking for my options for financing for better cash flow per month. The property is worth 110k and am putting down 20%. I have 750+ credit score and no debts. I have lined up commercial loan which may take another 45 days to close. Now my question is that I have found a w2 job that I will start in 15 days (Oct 17th). How soon can I qualify for conventional loan and can I time it for purchasing the property that I am in due diligence period? Thanks!!