Add to this that Installing Excel on a Server is not supported by Microsoft and you would also have issues with licensing in that anyone accessing that server would require...

i do not think there is any other option than a third party tool for that.
see https://dbmstools.com/version-control-tools/sqlserver for some options for SSMS.

Most of the times and if...

Looks like you are not after possible tools, but for someone to do the work for you (so you can charge your client as if it was done by yourself).

would help if you posted what you have researched already and what issues you found with each of the possible tools to do each part of the job.

so...

not to let down the work you have done but have you considered using a tool like http://record-editor.sourceforge.net/ which has most likely a significant part of the functionality you are...

thing with these "schema changes" is that many times they do not affect the code - one possible way to avoid this error in some cases is to set "

Google is your friend - do remember this.

First thing is the software itself so if your machine is Windows then you do need that windows host install

you can use domain accounts across domains as long as your domain admins enable trust between the domains - very common to do and probably the advisable thing here.

SSIS behaves differently from linked server.

What is happening there is that linked server is setting the column to null - which is not the same thing as not...