I have Nextel and I need to DC a guy who works with me part-time, only a few
days each month.  I don't want to start another line of service for $36 /
mo. for the plan with zero talk minutes and unlimited DC mins.  Are there
any other options?

I was considering getting a Boost phone and paying the $1.50 per day for
unlimited DC, if that plan means that you only pay the $1.50 on the days
that you actually use the DC function on the phone.

I only need to DC the guy for, on average, 6 or 7 days each month.  He would
not use the phone during the rest of the month.

Any suggestions?