hello:
Go ahead and take the plunge. Guinea keets are cute and they require the same restrictions and needs as a chicken chick.
For the first two weeks they are actually a bit less hardy that a chick, but the require chick starter, water and TLC.
After two weeks, keets are very hardy, much more so than a chick.
You can start using starter and game bird feed in a 50/50 mix and after about 8 weeks when they start "calling" you can go to straight game bird feed and start mixing in poultry grain or even horse 7 percent feed.
At 12 weeks they SHOULD go to free range so you will enjoy the fruits of your labor which is a tick free property.
These birds will "work" for you and clean your property of any annoying insects including grasshopers.
It is hat this point that you only need to feed them some poultry grain for energy and fresh, clean water every day.