Thanks.

I also checked, and there were no pre-compiled binaries out there yet, nor hints on using mod_perl on 2.4. Nothing post 2013 in fact. I know it's not broken yet, but when it does break we're going to have a lot to fix

We generally don't need all of the functions of mod_perl: just the speed. FastCGI functionality would probably suffice, but as you say, there's the not insignificant cost of porting large existing (10000+ line) code base, and information on running FastCGI/ Apache on windows is also pretty scarce from what I can see.

An alternate path is to port to Linux, as support of Linux in corporate hosting has improved. Especially as a VM.