You can combine a $567,500 first mortgage and a second mortgage up to 90% if you can find a lender who will do the second mortgage. Key Bank will do the 2nd mortgage but it's expensive. Then you can shop any lender for the first mortgage. I would have to check on the maximum amount you can fund on the 2nd mortgage.
The last I checked the 2nd mortgage was 9% with a 2% fee, but I would have to double check.