Please help!!! how much salary for me and wife infuture to own this home?

You can no longer go over 2.5 times annual income if you have at least 20% cash down. If you go over 2x income, you are likely to get into trouble even if you do put down the 20%. So you would need income of @$550k to buy in that range. Note that million-dollar-plus houses, due to the difficulties of obtaining mortgages in that range, are frequently all-cash deals.