jj you are too anxious at the moment and vulnerable. The little one we took on is, as I have said before, hard work. He is now a delight in the house and garden, hugely affectionate and we love him to bits, but impossible to let off the leash outside (2 years later). He also has begun attacking any other dog we meet (think he is being protective of his new-found security and family) and I am contemplating buying a muzzle for his walks. He is about 10 inches high but will go for anything, honestly.
Unless you are happy about coping with something like this, I strongly suggest that you help the dogs by being a dog-walker and wait until an older chap, or chappess, sits there appealing for a return to a comfortable home.