One of the biggest reasons for confusion when shopping for a house: Not putting the correct information for your loan situation.
If you are searching houses and assuming 20% down and an 800 credit score which will give you the lowest rates, your rate and monthly payment may be much higher when you talk to your lender if you don't have that same lending scenario.
The best thing to do before searching or while searching is to make sure you are putting the correct down payment, correct interest rate (which may change daily) and adequate homeowners insurance.
If you have any questions regarding this, give us a call and we will guide you!