#1
whats the advantages of fretless necks? if i were to take off the frets and perhaps a new fretboard would it work?
#2
Yes, it'd work. You'd need to buy flatwound bass strings, and you might want to finish the fretboard in something durable (don't remember the name).

The point of a fretless neck is mainly smoother tones and the possibility of true legato slides.