Anything wrong with my budget?

Hi all,
can you help put me the two and two together? i’m married w/ 2 preschool kids looking for a good home in north county inland. Single income in a low 100k w/ no debt. My budget looks like this (image attached), which put house price i can afford no more than 490k, no hoa/mr and 30% down. We’re looking for 2k sqft and like the 4s ranch area, but there’s nothing at this price level. Are those ppl living there just making way more or is my budget too conservative? (i’ve not updated the tax pct to account for mortgage interest deductible, not sure how much it’ll save.) Thx for ur input!