Answer:
What is always coming but never arrives?
I begin and have no end. Eventually I will be the end of all that has begun.
I can be sweet or sour. I do not rhyme with any other word
I carry you down a gentle stream.
I live off of a busy street if you want you can stay for an hour or two but if you don't pay rent I'll tell on you.
A little house full of meat, no door to go in and eat.