There is no limit to the number of files you can convert, you can download whatever you want!
Yes you can, you can convert and download Soundcloud MP3 song from any of your device. Free MP3 Music if you using SoundCloudMp3.online to download
With a single song track, you can convert 1 track at a time. But with a song playlist, you can convert all song in playlist once
Depend on the length of the original song and the time of the day