using hard money for a down on multi-family rental property

Would it be feasible to use hard money to fund say....75% of the 20% down (bringing to the table your own funds for the remaining 25% of the down) and use conventional financing for the purchase of a multi-family unit.....then 6 mos later, refinance to pay off the HML? I'm thinking that the problem here would be LTV..... Any thoughts on this scenario would be much appreciated. I'm trying to wrap my brain around some different creative financing strategies....I've got "some" capital and really good credit but need more capital to make this happen.