ACR Batch Crop, overwrite original files?

Hello All,

I am currently trying to find the best way to achieve a big task; I have a large number of photos for a client (2500) that need to be be cropped into a square image, but currently all these images all vary in their aspect ratio. In order to avoid upsampling and cropping each image individually in photoshop, I've found a script that will create a 1:1 aspect ratio by adding white margin to the short side of the image.. that's the easy part.

SO, I am left with images that have a 1:1 aspect ratio, but now that white space needs to be cropped out. This is where I need help.

I was trying to achieve this in ACR because it will allow me to custom crop multiple images while preserving the 1:1 ratio. I need to be able to control/adjust the crop if needed, so auto crop or a same-crop script will not do. The problem is, that because ACR is parametric editor, it does not allow me to overwrite my existing jpegs. The program creates a copy and adds a "_1" to the end of EVERY file and, regardless of any numbering already created from my Photoshop image processor. This is an issue because I already have the correct file names + numbering from the previous processing in photoshop.

I have looked all over the web, and have found some very helpful info, yet, I am just on the cusp of trying to achieve it. I am inexperienced with Photoshop scripting, so I do not know if there may be a better way to achieve all of this at once. Really the main issue is just that my files need to have a specific nomenclature, and ACR is ruining it and making extra work for me! Is there any other program that can achieve a batch cropping of this caliber while allowing overwrite? I know there are a lot of programs out there that can batch crop for me - however the specific functionality I require from Camera Raw is the ability to control each crop manually when necessary, while maintaining the 1:1 ratio (the images are all so different that I literally need to see the crop to ensure it's okay)

Is there possibly a better way to do this? or even to somehow bundle all of these processes together?