I'd be happy to assist your son and pay you a referral fee. I have done extensive real estate relocation work with buyers, so this is familiar territory for me.
A few people have mentioned that the area where your son will be looking is important, which you as an agent know anyway, but you may not know the Phoenix areas. Metro Phoenix is roughly divided into West (Surprise, Sun City, Tolleson etc), North (Cave Creek, Anthem, Troon, north Scottsdale and north Phoenix,) Central (Phoenix, Glendale, Peoria) and East Valley (Mesa, Tempe, Chandler, Gilbert).
I work in the East Valley and south Scottsdale, so if those are places your son is considering, please check me out. I look forward to hearing from you or him.
Ann Griffin, Realtor, ABR, E-PRO, E-Certified
Prudential Arizona Properties
1630 S. Stapley Dr., #100
Mesa, AZ 85204