I would've thought it would save you money to keep and use the cloth, even part-time...that's 4 nappies a day it's saving you. You've got them now, so it's not like you need to spend anymore money on them, they would wash with a bunch of towels at a 60c wash so you wouldn't need any extra washes doing or to use any extra washing powder.
How many disposables do you get in a packet? 36? If so, and if you used 6 nappies a day that would cut you down to only using 2 disposables a day and extend your pack of 36 nappies from lasting 6 days to lasting 18 days.
Are you sure we can't tempt you into trying them again?