Great comments...thanks everyone. I wish I would have posted here before I sent the proposal. From here on out, I'll definitely stick to a more standard pricing. I didn't offer to do it for free by any means ($30 for each of first 10KMs, $10 for addtional kms, IRS mileage rate, and hotel expense; it came out to about $800), but I think that still falls $400-$500 short of a typical starting price.
It's been a few days and I haven't heard back from the RD, so it's probably moot at this point. But I'll take your advice, Duane, and send her the link to mapmyrun.