This is a great question, that many buyers will ask. Your month payments have several variables, including but limited to, interest rates, credit scrores, and lenght/style of mortgage. (Fixed/ARM)
Your credit scores and debt to income ratio will impact your interest rate.
But for this, we will use an avarage example.
$100,000 Purchase Price
$30,000 Earnst Money
On a 30 Year Fixed Mortgage at 5% rate payments should be about $375.78
Now, your bank might require your taxes to be escrowed into your payment. Which can raise that amount based off your taxes.
I would strongly suggest though that you talk with a mortgage broker. To see all the options available to you, as well to fig in all the X factors.
If you would like, I can have a mortgage broker reach out to you.
Hope this help. Best of Luck
I get the same figure as Adam: 375.78.
You can perform this calculation for yourself if you want to run more numbers.
PML of Longmont