Hi Jayden,
valerostudio is definitely right about pitching to come companies and set yourself up as a independent supplier for them. I run my own practice in UK as well as teach architecture in university and I have seen a lot of my students doing off jobs as visualizers. Also a good plan is to talk with small interior design firms and kitchen design firms as they need a lot of fast passed output. I think the main thing is dont drop the prices to the level where you are on brink of survival. Portfolio is the key as well as nice to be backed up with good references. Always ask for deposit and keep brief in writing as clients like to 'change their mind' too often.