Have you tried for any help from local groups in your area? Alley Cat Allies?
Cat Care | How to Catch a Stray Cat | Rescue, Spay & Neuter Resources
Feral Friends Network® Connect
If you use the second link you may find some help in your area but there are a number of resources on the site.
Cat Care | How to Catch a Stray Cat | Rescue, Spay & Neuter Resources
Feral Friends Network® Connect
If you use the second link you may find some help in your area but there are a number of resources on the site.