Several points here, Dan.
(1) You don't necessarily need a PC. An old Mac, Mini, MacBook, iMac, providing it runs OS X 10.8 ( perhaps also 10.7/ 10.6) can be set to run Windows automatically. Download the BootCamp drivers (and instructions) from Apple, install OS X and then Windows. The Mac can then be set to boot straight into Windows thereby turning it into a hybrid PC.
(2) Both Mac and Windows can READ but not write HFS/NTFS files. To do so, (though not absolutely necessary, strongly recommended), you'll need a file system driver such as Paragon. Paragon HFS for Windows provides full read-write access to HFS /HFSX partitions on any type of disks (GPT, MBR) under most Windows versions.https://www.paragon-software.com/home/hfs-windows/
I suppose I will have to set up Lightroom on the PC if I want to print from Lightroom.
Yes, you will.
LR doesn't work over networks BTW.
LR reads any MOUNTED volume., which should also include any shared disks or network mounted disk arrays.
Parallels, is better than VMWare BUT these are big,big, complicated solutions that litter your disk with an untold number of programs all in the name of interoperability.Though much improved they're is still a big performance hit. I'm not even sure that your Sawgrass drivers will work under so many layers of translation. Too many variables should you be unable to print- (is it the driver, Parallels or the OS, either Win or OS X). God help you if something goes wrong. You will most definitely need first-hand confirmation that they do. Above all, in your case, don't think it's even necessary.
ps The other option, of course , is to set up a BootCamp partition on your current Mac. But then you'll have to logout and login to Windows each time you want to print. The round trip soon becomes irritating unless you do it only occasionally.
ps#2 If you decide on a second 'box' you may wish to look into some 'free' screen sharing options as well, such as Splashtop and TeamViewer which both allow you to see the screen and operate remotely. Splashtop also from an iPad.