With an income of $70k, your mortgage should generally not be more than $2k per month (about 35% of your income).

Assuming a 30 year fixed loan at 6.5%, that translates to borrowing about $320k. With a $170k down payment that adds up to $490k. Pretty much absolute max, but could be less if you have other debts or expenses.

You can definitely find a homes in western Washington for that amount.