$300k salary

I am being offered a job that will require me to relocate about 2 hours from where I currently live. I will be going from $120k salary to $300k. I’ve clearly never made that kind of money before nor do I currently own a home. I will be a first time home buyer, actually. People that make $300k in Texas, what home budget should I essentially be looking for? 300k? 500k? More? Married with 2 kids.