Digital BW, The Print

I've got a corporate client who, w/in the next 2 weeks, will be 
purchasing 4 large (at least 20x24) B&W prints from me for their 
office.  I currently have an Epson 2200 + ImagePrint, so obviously my 
current equipment won't work.

Here's my dilemma, given that I'm currently looking at purchasing a 
wide-format printer, but haven't done so yet.  Do I (a) go ahead and 
get a 9600 (my top choice at the moment) plus ImagePrint and do the 
job myself or (b) send these prints out and continue the long 
painstaking process of deciding what to do in the long run for large 
format B&W independent of this current job?  I haven't yet figured 
out what I'm going to charge these guys (any help there would be 
greatly appreciated).  But if I send it out to West Coast Imaging, I 
guessing it will cost me around $100 (I had a 20x30 Piezo print done 
there a few months back and it was around $120), thereby 
significantly cutting into my profit margin if I charge anything like 
a reasonable price for the prints.  (Another factor is that they also 
want me to frame the prints -- I guess I could jack up the total cost 
by "writing it off" to the framing cost....).  Assuming it costs me 
about $10 each to make these prints myself on a 9600 (I just made 
that number up), I could make $90 profit on each print.  Or, I could 
send it out to West Coast and make almost no profit unless I want to 
give the client a serious case of sticker shock.

What would you do in this situation?  I mean, I'm getting tired of 
throwing money down the drain by having someone else do my wide 
format work, but I don't want to be hasty on the purchase of a 9600 
either....

(A final piece of the puzzle is that I have been thinking about 
having 2 printers, one dedicated to B&W probably running the UT7 
system when it becomes available.  But to do this job (right) myself 
on the 9600, I need ImagePrint; and if I buy ImagePrint (I got a 
quote from a dealer of $2000 for it for the 9600), I ain't buying a 
second printer for a LONG time).