If they have kids they want to live in lower merion or radnor with a third choice of haverford township (I live there, but the schools are not quite as good as LM or radnor, but coopertown elementary is as good as anything and you can buy a twin near me for 200-250k). These are the best school districts that are commutable to philly easily. Most of the houses are very expensive (700k+), but if you know what and where to look you can find something normal people can afford (200k-500k). There are some rentals available too.
How reasonably priced are they looking and what in particular do they want for housing?
Zip codes to search would be 19003, 19010, 19035, 19041, 19085, 19087
*not legal advice*