Need 2 songs mastered

I'd like to request the mastering of two songs, so can you tell me how much time and cost it will take? I'd like to proceed with it with you Mike

Additional info:
I'm an indie artist. I'm looking to hire a top pro who's worked on hit songs, and have the budget for that. . I need mixing and mastering. I'm looking to master two songs. I don't have a hard deadline for this.