Advise on bathtub surround for rental unit

[Mike Weiskopf]

Recently acquired 4plex unit has a leak from the bathroom, where the tub meet the tile wall. Several bottom row tiles have cracks in the grout, and a crack in the new caulk where the whole tub meets the tile wall. The tile is dated yellow from 1978. I would like a somewhat quick inexpensive fix. Does anyone recommend gluing a custom tub surround to the existing tile walls? This would not only look nicer but seal it up as well. Any advise?