Digital BW, The Print

The customer wants 90-200 4x6 b&w pictures of a wedding (but they want some
color too and that's why I'm shooting in color digitally)...would it be best
to send these files to a lab or print them myself? If printing myself, would
it be best to buy an HP-245 (small portable 4x6 printer than can get
dedicated black/gray cartridge) or use my current 1270 with MIS-UT2 inks? If
I use my 1270, I don't know of any 4x6 (or even 5x7) matte paper (or
whatever paper for MIS UT2). Therefore, I'd have to cut it myself and based
on past experience of my cutting...it'll look "home done". Unless somebody
knows of some pre-cut paper that will work nicely?

If a lab is a better idea, anybody know of a good lab that prints affordable
4x6 black and white prints? I know Walmart and the others will print pseudo
b&w..but anybody know of a lab that will do true b&w? (I guess even if's
it's not cheap....)

I'm just trying to weigh options of quality, price and time involved.

Thanks,
Barbara