That's a lot to put on my shoulders. If you want some recommendations I did a little research and this is the package that I came up with:
Azden SGM-1X - Super-Cardioid Shotgun Condenser Microphone, about $150.00. I've never used it but have had good experiences with their very high end stuff.
Gitzo G-556 3-Section Aluminum Boompole, about $90.00. A boom pole is a boom pole, but aluminum is heavier than fiberglass. Remember that your sound person will be holding this up for maybe hours on end. It's an industry mantra that boom guys have the arms of gorillas.
Sony MZ-M10 minidisk, about $300.00. I've never used it but have had good experiences with Sony products.
You will also need:
mini stereo male to 3-pin XLR female cable to connect the mic to the minidisk
minidisks
some extra batteries
a set of headphones
a windscreen
a USB cable
something to carry it all in
You're looking at about $600.00, but I'm sure that with a little shopping and some wheeling and dealing you can get it close to $500.00. I buy gear from both Sweetwater and B&H Photo and have gotten excellent advice and support, especially at Sweetwater. Check out their websites. Also check out E-Bay, there are usually some nice deals there as well.
Please, please, please get some other opinions and advice before committing to these specific products. I haven't done any location work in a long time, and it was always with very nice stuff, like the Sound Devices 442 mixer, an ME-66 shotgun with a nice blimp, a really nice DAT, some great lavs and all of the accessories including cases that made it all usable while carrying it, about $15k or $20k worth of gear, so I'm not really up on the budget stuff.
Contact me off list if you need more help.