I applied as a post-bac student with only 4 classes completed and got in everywhere I applied (4 schools, all traditional, 2-year masters programs). However, I didn't complete a specific certificate program, which means I only applied to schools that mentioned on their websites that they accept students with a degree outside of communication disorders as long as those students complete the pre-reqs. I also didn't apply to any California schools (despite being from California) because most of them (1) seem really strict on their pre-reqs and require a bagillion of them and (2) are super competitive.
Letters of rec were the hardest part. I had one letter of rec from my undergraduate thesis advisor, one letter of rec from my employer between my undergrad graduation and applying, and one letter of rec from a professor for one of my post-bac classes. I only took one class from the COMD professor, but I did very well in his class, worked to create a personal relationship with him, and provided him with folder of my resume and work samples from his class when I asked him for a letter of rec. I wish I could have had letters from additional COMD professors, but I just didn't have the relationship with any other professors to ask for a letter of rec that I thought would be meaningful.