My answer depends on what size fat fryer you have bought. I’ve got the mini one, it takes 1 litre of oil. I was in the same fix as you not really wanting to use oil but eventually having to; it’s not that bad so long as you change it on a regular basis. When I first started using mine I used solid fat, I kept my fat in a Pyrex jug, I would warm it slowly in the microwave, you may not have a microwave I know, then pour it in the fryer, after I’d leave it to cool but not set, and pour it back in the jug, the jug sat nicely in the fridge and didn’t take up too much room. This probably wouldn’t work if you have a large fryer as you’d have more than one jug. I’ll tell you what though, doing it this way showed me how much fat actually stays in the food when you cook it, boy you see how much less fat goes back in the jug each time!! I changed to oil as I forgot to take my fat out one day and it was the devils own job trying to get it out and the fryer cleaned without switching it on. Hope you find a way that suits you, enjoy your chips.