What is a DMTL?
The cooling system you should be able to DIY for much,much cheaper. I mean, even if you went all out and changed water pump, fan clutch, hoses, everything but the radiator, you're still looking at $600 in parts or less. And the radiator wouldn't cost much more.
I don't think there should be much of a problem replacing the MAF sensor. If the cra needs to be reprogrammed (I kinda doubt it, but I am not sure), then you can still have that done after you perform the install yourself.
What car do you have?