I was about to vote for patinba's 'smallholding', when I decided to look up 'patio economy' and was surprised to find quite a few legitimate references in English. Since that's what your text uses in Spanish, it might be a nice touch to keep it.

The first 2 references are from UNDP, where the English translators are native speakers and very carefully trained:

It will be achieved through the integrated delivery of production inputs (Food Production Vouchers for some groups of families and **patio economy incentives** ...
sdnhq.undp.org/opas/en/proposals/suitable/1820

Feb 11, 2010 ... and nutritionally improved diets for pregnant and breastfeeding Local and regional governments, Give patio economy incentives to women, ...
www.docstoc.com/.../MDGF-2014-Fwork-Nicaragua-ENGv02xls---U...

Honduras - University of Minnesota Human Rights Library
... in addition to losing homes and fields, women also lost the inventory of their “patio economy” such as small animals, kitchen utensils and gardens. ...
www1.umn.edu/humanrts/iwraw/cescrhonduras.htm

From a report published in Boulder, Colo:
Family Agriculture and Patio Economy. These Family Gardens are not just a program to grow vegetables. They are an integrated and sustainable system that ...
www.boulderjalapa.org/spring2008.pdf

broadened to include animal husbandry and patio economy, with the aim of enhancing the programme's sustainability through income generation. (IADB, 2003). ...
doi.wiley.com/10.1111/j.1467-7660.2008.00507.x

(12/7/2005) Hurricane Stan Will Deepen Latin America Poverty For ...
... particularly the most vulnerable: the rural population, women peasants, and small enterpreneurs, whose 'patio' economy suffered damages and losses that ...
www.albionmonitor.com/0512a/copyright/hurricanestan.html

William G. Moseley, David A. Lanegran, Kavita ... - 2007 - History - 466 pages
... literally patio economy – for women, rather than more large-scale and profitable agriculture such as cattle-ranching or coffee production. ...
books.google.com/books?isbn=1405149221...

From a publication of the Canadian International Development Agency:
Oct 4, 2003 ... PADEL II supported the traditional 'patio economy' only as a springboard to more profitable economic activities. The Fund provided ...
www.acdi-cida.gc.ca/INET/IMAGES.NSF/vLUImages/.../$file/GEF-E.pdf

'fight women's poverty' via credit schemes and the patio economy ... topics such as the patio economy. However, the perceived success of implementation of ...
www.cisas.org.ni/prsp/PDF/PRS_Eval_English.pdf

And from my alma mater, where they also use only native English translators:
of in-home income-producing activities (patio economy, the raising of small ...... The so-called “patio economy” and small livestock production are also ...
www.bvsde.paho.org/bvsade/i/fulltext/earthquake/earthquake....