I would hire film students with their own equipment to shoot for you.
Correct me if I'm wrong but that cam has no mike input.
On the cheap I'd try 3 of these: CANON HFM40.
I'd get three
http://www.bhphotovideo.com/c/product/628720-REG/Libec_TH_650DV_TH_650DV_He...
Then I'd figure out how much money you have and get a decent mike/miker/audio recorder.
This will cost more than your cams. Can't go wrong with sound devices mixers. Get the mix pre d.
which will help you with good sound live and in post for added voice overs.
But seriously get a student film crew who can handle this pre through post and you'll up the bar. Ask them for a reel of their work to make sure they know what they are doing. Ask for a sample of an instructional video. SFX is not the point here.
OSX 10.5.8; MacBookPro4,1 Intel Core 2 Duo 2.5 GHz MacPro4,1 2.66GHz 8 core 12gigs of ram. GPU: Nvidia Geoforce GT120 with Vram 512. OS X 10.6.x; Camcorders: Sony Z7U, Canon HV30/40, Sony vx2000/PD170; FCP 6 certified; write professionally for a variety of media; teach video production in L.A.
