Good on you for considering fostering Debbie, and good on you for thinking about things first, it isn't something to go into without a lot of consideration. I have been fostering for just over 3 years now, think my numbers are up to about 38 (with more to come as soon as I get back!!). The shortest has been 4 days, but that was purely cos CP then got asked to take in mum and kittens so 'swapped', the longest has been 14 months (and that was very hard, as he had issues that meant my house wasn't the best, but we struggled to find an alternative for him). As the others have said, do make sure that you know where you stand with food, litter and vet costs, the last thing you want is to struggle. You also need to be able to let them go at the end of it, especially if you are thinking of going down teh short term while owners are in hospital route - you might want to contact the Cinnamon Trust in that case, as well as local rescues. You also need to be able to set a certain time away every single day for the cleaning, and human contact aspect, I would say a minimum of an hour and a half a day. Working full time needn't restrict you, I work 9-5 Mon to Fri and still foster, as well as have my own and do other bits for the rescue. Admittedly, it does mean it takes over most of the week, but the rewards are worth it.