I would say we are well off, not wealthy. We could be much richer but are very grateful for where we are now and how the future looks - we have money enough for our needs and a bit over (plus savings, pensions and ability to help family members now, and our kids in future).
It certainly has been due to hard work from both myself and DH to take long years at uni, professional qualifications and continuing focus on mostly my career, although he has always worked for the good of us as a couple and family its only now he is getting appropriate recognition and progress in his career, and I will always be the main breadwinner. No second homes or big holidays, late onto the property ladder, only 2 children and lots of money used along the way in student loans and professional development. Neither of us have received money from parents or inheritance, beyond occasional birthday gifts of 50 - 100 , apart from last year when DH inherited 5000 from his grandmother.
So we could say our good fortune was self made, and all off our own backs - but that would be completely lacking in insight. We have both of us been very lucky to have had upbringings that might have been poorer and more financially constrained than our current situation (me in particular) but that gave us the tools and drive to work for our own security - eg stable homes, good role models and work ethics, a basic sense of security and reliability, encouragement and support of our talents and education that allowed both of us to progress. Both of us grew up with a set of life skills that meant we could deal with our own periods of privation, and had the confidence in ourselves to take decisions that while hard benefited us long term (extra qualifications, short term sacrifices for long term gain, moving for work, emigration).
Our respective parents, while not wealthy (and unlikely to leave us life changing inheritances) are the bedrock of the wealth and success we have. It probably helps that DH and I are on the same page most of the time, motivated not so much for wealth in itself as to make the best of opportunities, and have capitalised on the occasional bits of luck and chances that fate and fortune threw our way. And of course we have been incredibly lucky not to have major health problems, and DCs without significant extra needs, or significant caring demands placed on us. I feel very fortunate I now stand in a position where I can directly help other family members and give back in various ways indirectly.