Before you spend your hard-earned money on a song demo, you would be well-advised to seek the opinion of a music industry professional. You can see from her Bio that Jeanie McQuinn is an educated, experienced & successful songwriter.
For the industry standard fee, you will receive top-shelf advice regarding your melody, lyrics, structure, phrasing, instrumentation, key selection and demo suggestions, as well as other creative ideas.
Contact Jeanie McQuinn : firstname.lastname@example.org. You will need to send an MP3 guitar/vocal, piano/vocal, or if you've already made a demo, send it with the song lyrics.