Reasonable Compensation for Serving Eviction Summons/Complaint?

[Neil G.]

Lawyer advised I can't serve them myself of course since I'm plaintiff so just ask any friend or acquaintance to do so, doesn't have to be a licensed process server. I'd rather it be an arm length distance and a paper trail so will write a check for the errand. He said each of the 4 named defendants has be be served individually. How much should my server be paid per defendant served? And is it legal to compensate for such an errand?