I need to hire a professional to work on persistant MCU errors

While I can surely understand your frustration, the quality of your statements does not make it any better. Thus, I kindly request you to tone down a bit.

In addition, you should not forget that Creality printers are in no way business or industry machines but consumer grade hobby tools (rather at the lower to mid segment).

In any case, there is a long history of folks that are successfully running such printers with Klipper.

For the Timeout with MCU / Lost communication with MCU error, check the link. Unfortunately, it can be somewhat tedious to hunt down but in all cases that I’m aware it was about the quality of connection between board and SBC.

As a general advice, simplify your setup as much as possible and go step by step.
For all future requests also attach the respective klippy.log files.