Speaking of CNC capabilities, half a dozen years ago there seemed to be a whole cult on the web, of folks using the Grizzly G0704 (perhaps the most popular unit used at that time) and units of similar build with other numbers and/or other brand names, doing home conversions to CNC and there even seemed to be kits available to make the conversions. Don't know if that is still true today, as I have no intention of doing such a conversion, so haven't been following those sites. I'd guess that is now "less of a thing" as dedicated CNC hobby sized mills are probably more available now than they were back then.
As for the DRO option, I cannot recommend it too highly, and were I to do it again, I'd have bought my mill with the factory DRO installed. Instead, I purchased an after-market DRO and installed it myself, which has actually worked out just fine, but it was a whole lot of work that might not have turned out as well as it did, and which ended up saving very little, if any, in total dollar outlay.