Appointments with the podiatrist are really not necessary ! Go to the hardware store and invest in a dremel. You can do their nails yourself in a few seconds, weekly or at need. I do mine about every 10 - 14 days.
Sit down, grab a dog and tuck it firmly under your arm, so it is kind of sitting up on your lap. With the arm that is around the dog, hold each paw by turns, steading the claw to be trimmed. With the other hand, a quick rub with the dremel to each claw - and move to the next paw.
As they are very long, you might have to take them back with a Resco clipper first, but then maintain them with the dremel.
All over very quickly and a 'special' bickie, perhaps, as a reward.
Whoever is done first goes to the cupboard and paws at the door for his treat even while I am still doing the other !