Water leak above ceiling?

Well I worked for one of those companies and have some tips for you. You need to dry everything out the best way to do that is airflow. If you can take up some box fans or something to get the air moving that will help. The small dehus will not work unless the temp. is above 45 degrees. Below that the condenser tubing will just freeze up. You noted that you live in MI and this is an attic. Probably your best bet is to pull out the insulation that is wet. Dry the wood with a fan and you could even pull out the drywall and that wouldn't be too expensive. The wood shouldn't take too long to dry and should be OK. If you get a little mold on the wood it is OK to sand off and the wood will be structurally safe. Just were a dust mask.