I got it to do what I need with:
services: IIf(IsNull([service1]),""," " & [service1]) & IIf(IsNull([service2]),""," " & [service2]) & IIf(IsNull([service3]),""," " & [service3]) & IIf(IsNull([service4]),""," " & [service4]) & IIf(IsNull([service5]),""," " & [service5]) &...