WRT prices of contact lenses, I use an ultrasonic contact lens cleaner with plain saline (Ringer's will also work if that is cheaper in your area), then storing the contact lenses in my lens solution to disinfect. Far better comfort profile, for far longer, than I ever obtained following the manufacturer instructions of 20 seconds rubbing on each side, and 5 seconds rinsing on each side. The saline is half as much as the normal lens solution, I use it liberally to rinse the ultrasonic cleaner, I get more use out of my contacts, and I use far less normal lens solution. So far I haven't encountered any drawbacks, YMMV.