How to build a kernel module?

I thank you for your response. I hope I can replicate the process without term outputs as I am away from the VM. I am using code tags sorry if that is inappropriate.
The what:
I need to recompile a kernel module, usbip to be specific, to up the port counts and virtual hubs.
The why:
I have a need to connect more than 8 USB drives over the network.
The how:
I identified my current kernel

 uname-r 

I installed the needed dev tools

 sudo pacman -S base-devel git 

I installed the linux510-headers (I run 5.10.49-1)

 pacman -S linux510-headers 

I downloaded the kernel source from Manjaro

mkdir ~/Mine cd ~/Mine git clone https://gitlab.manjaro.org/packages/core/linux510.git cd linux510/

I made the src

 makepkg --nobuild 

I prepared the source directory

srcDir=src/linux-5.10 ln -s /usr/lib/modules/5.10.49-1-MANJARO/build/Module.symvers "$srcDir/" zcat /proc/config.gz > "$srcDir/.config" make -C "$srcDir" modules_prepare

I adjusted the .config to contain the new values

nano .config changed line CONFIG_USBIP_VHCI_HC_PORTS=15(8 default I did not leave these comment in the file) changed line CONFIG_USBIP_VHCI_NR_HCS=10 (1=default) saved

I made the modules

  make --directory="$srcDir" M=drivers/usb/usbip/ 

I packaged it for the system

 xz "the long path down"/usb/usbip/ *.ko 

I moved the files to the current kernel location

 sudo cp -r "the long path down"/usb/usbip/*xz /"path to current running kernel"/usb/usbip/ 

unloaded the current module and attempted to install the new

sudo modprobe -r vhci_hcd sudo modprobe vhci_hcd modprobe: ERROR: could not insert ‘vhci_hcd’: Exec format error

The last error is the only error I had during the whole process
Thanks once again