Stray Cat Colony in Need

My husband and I recently discovered a small colony of stray and abandoned cats in need of help near our home. While we would love to take at least some of these cats in, we have 3 cats of our own and do not have the space nor funds to add any more. While all of these cats appear healthy and friendly, no one has come to claim them. One of the cats appears pregnant or like she recently gave birth, and another very clearly hasn’t been neutered. Luckily, two of the females appear to have been spayed by their previous owners. Unfortunately, there are a few others that we haven’t been able to get close to yet. At the very least, we would like to trap, neuter, and release these cats back to their territory, just to prevent them from having more kittens. However, it would be costly. We are hoping for a few small donations to help reduce the cost on our end, and will be glad to share vet records and photographs to assure any donators that the money will only be used towards helping these animals.