hey doug.
I have exactly what you are thinking of using. 10 meters for Cat.5e would be best for running this distance as its twisted pairs arnt all the same they have different twist rates. but realistically if the signal is decent coming from the host and recipent devices cat 5 is good for some 50 - 100 meters. after that you need either a stronger signal or signal amplifiers.
Just make sure its a straight though plug not a cross over
