good to know you're thankful, sometimes money is not everything in life....it is certainly important but doesn't mean those who earn more will be happier than the ones who earn less, as you get paid more, work pressure, responsibility and expectations increases as well (in most cases)

if you feel what you earn is not enough to sustain your lifestyle, take up courses, increase your knowledge and skills, keep your profiles on linkedin updated, look out for job opportunities and eventually you will find what you are looking for

sometimes many of us get too comfortable with where we are, there is nothing wrong with that, it depends on personal preference

if you wish to grow, keep improving yourself, keep learning and keep looking out

if you are happy with what you have then thats good for you

most importantly, don't compare yourself with others (at least try not to), every one has different qualities and goals in life

Boy oh boy, I'm really amazed at how you manage your family of 5 with your single income source, kudos to you for doing that!