I had a consulting group for 15 years. Despite a potential high net income and FICA in the Excellent or VG category, if you are an entrepreneur, lending institutions are going to treat you as high risk and turn you down for minor loans that otherwise you would get in spades in the blink of an eye if you were employed by a large company like Amazon, Microsoft, or even a good civil service job. If your partner doesn't have a full-time job with an employer and you are a full-time entrepreneur, getting a mortgage will be very difficult from traditional lending institutions. Private lenders will be a strong option for you if you're looking for a mortgage and you are an entrepreneur.
I highly suggest people take a full-time job with an employer and earn six figures with benefits, then have a side hustle that brings in potentially high added income. Never ever ever tell your work colleagues that you have a side hustle because they will hate you and throw you under the bus. That is not how you make friends. Remain humble in your full-time job. Dual or multiple income sources is not something you should talk about but it's absolutely something you should pursue. Building relationships with the banks means that you focus on your full-time job with the employer and let banks see that moreso than any risky other behavior.