Cost : 2 Point Light for each item, and some common materials.
First I upgrade for myself the Sigurd's shower cabine - making it almost without pigment and more usable. (Original: http://planet-explorers-isos.com/planet-explorers/iso-details-shower-cabine-62.html)
But then I wanted to get a full set of bathroom and made it, adding a self-made sink and toilet. Well, then I made it as separate files. Here they are.
Three ISO in 1.4 Mb zip file.