With the low pressure setting that you have, the air may not dry out as fast as if you had a higher pressure. Depending upon where in the country you live, some states have much more humidity in the air than others. It sounds like you are curious about the humidifier use...what have you got to lose by trying it????????????
Especially if you have it just lying around. You don't have to use the heated hose, you can try it with the standard hose and if you don't feel you need the humidification, then no harm, no foul. If you do like it, you can add the heated hose at a later time if money is an issue, or if you are using a DME and you have met your deductible for the year, see if you can get one before the end of the year.