Cost effectiveness

Peer programmes can be economical.  They are relatively less costly to operate than programmes that do not involve peers, as they build on existing experiences, existing networks and are often based on having many voluntary participants.

Although often underestimated, it is not prohibitively expensive to start peer work, especially when the activities can be dovetailed with other activities and integrated into overall programming.

Combined with its efficacy, cost effectiveness is another argument for undertaking peer work, as UNAIDS and WHO document.
http://data.unaids.org/publications/IRC-pub01/jc291-peereduc_en.pdf
http://whqlibdoc.who.int/publications/2004/9241591528.pdf

Peer work gives’ bangs for your buck’ and is a wise use of limited resources.  Its cost effectiveness is a good argument for programme managers to use to solicit support for including peer work in their programmes.