Believe me, I'm not Dave Ramsey, but what you are contemplating causes me to feel anxiety for YOU. It can be tempting, but please don't over-reach, going to 50% of gross income is extremely high, even if the underwriters will approve it. Underwriters will gladly approve loans that leave you zero each month to: contribute to church/charity, enjoy a stress-free life, take a vacation, etc., you get the point.
Make sure you have your backup plan in place to bail you out if the hoped-for higher income doesn't materialize, and your monthly expenses begin to exceed your income (such as selling a vehicle that has a payment on it, maintaining liquid reserves, etc.).
Sorry, not trying to lecture, but living without financial anxiety is priceless.