Need my covers mixed and mastered

I am thinking of singing covers of my fav songs, using the -1 tracks for yt channel. Need them mastered & mixed. I naturally have sweet kind of vocals, i expect that mixing/mastering should not change the sweetness of my voice. Some pitching/notes may need auto tune. Would u be able to do it? What do u charge per track? And how many days would u take to master/mix one track?

Additional info:
I'll need you to master it too if possible. I need the vocals tuned as well. The song is fully recorded. I just need mixing and mastering.. I'm interested in working with a very experienced mixer. I don't have a hard deadline for this. . I'm an indie artist.