active directory - Should I upgrade a Windows Server 2012 to be a Domain Controller to run console apps as admin at startup?

I would like to upgrade a single Windows Server 2012 instance to be a Domain Controller.

The exact context is that I have some console apps that need to be run as administrator at startup. And from testing on a debug server, upgrading a server to be a domain controller allows this. Aside from this, I tried adding a batch file to the StartUp folder and logging in an admin user automatically - but I could not get the scripts to run as admin.

The production machine has to have ports opened explicitly - and almost certainly will have many of the ports that ADS seems to require according to blogs/articles such as this: https://isc.sans.edu/diary/Cyber+Security+Awareness+Month+-+Day+27+-+Active+Directory+Ports/7468

I'm a little worried that after upgrading the machine to a Domain Controller, that I will not be able to login. Is this a possibility?

Is there anything that should be taken into account?