criteria for suitable adoption applications vary from charity to charity - for many years I worked for one of the 'biggies' and each case was dealt with within a broad outline of what was considered perfect conditions. For example depends whether ot not you have young children, dogs, live on a main road, have other pets. IMO the most important thing is that the animal is genuinely wanted, it will have a kind permanent home and the person/family can afford to care for it. Wish I could re-home one to you, you sound as though you will give a cat a loving home. Older cats are in particular need as many only want kittens or younger animals. Good luck and I'm sure we'll soon be hearing all about your new friend.