Interior photographer or how to be not destabilized by the client

There are so many beautiful photographs of interior in high resolution taken with insane expensive gear that there is no way for you to compete with.We don’t have oil but we have ideas like we like to say in France. So do with what you have.
Give life to your photos, find some original point of view, details that give a mood, a feeling, a narrative.
In an other words be a writer. Don’t be solely focus on your gear but let your eye do the job.
Of course clients will tend to be surprised, even disappointed if you don’t come with a full frame camera and the gear that goes along. They will consider you less professionnel. But keep in your mind that  at the end good pictures speak volumes
With a mirrorless camera or even a good smartphone you can make wonders.