If you're going to sell this frame and it's in the "near future" (for me that might be a year or two, you implied that it might be end of season?) don't cut the fork. The next owner may want/need that slightly longer steerer tube.

If you have a Guru fitter nearby that might be a worthwhile investment to visit. The local guy here offers stuff like "replicate your bike and see what else fits" (so you can see what other framesets fit like yours, or slightly differently from yours, with corresponding stem length/angles, saddle height/setback) as well as "try a virtual frameset" (like if you're looking at a bike being sold via eBay or whatever and it's not local and you want to make sure it'll fit). Obviously a full blown Guru fit would work too, but I spent almost 50% of my frame price on a fit with the guy, so there's that. The full fit would allow you to experiment a bit with reach etc while pedaling and measuring power.

Disclaimer: I know the Guru guy and basically forced him to take my money (as well as giving him a brand new saddle that cost me $165) after he offered me a free fit. We probably spent a total of 5 or 7 hours doing the fit and I learned a few things from it. I did it AFTER I bought my two framesets so I was going in thinking I'd learn nothing. There were two things that happened. First, my saddle-BB distance was spot on to the millimeter. Second, I quickly maxed out the Guru gizmo's frame length - it fell short by 2 cm so I couldn't even replicate my own position, forget about experimenting with a longer one. My takeaways were that my cleat position was fine, my saddle position was fine, I got some insoles, and I changed to an ISM saddle.

Incidentally during the fit he asked me if he could use me as a guinea pig on a couple things. One was the "don't hold the bars while sitting on the bike" balance thing. I ended up with a BMX position where the saddle was something like 10-20 cm further back, maybe 10-15 cm lower, and the bars were super close (by 15 cm?) and super high (raised maybe 10-15 cm). It was such a ridiculous position that he took extensive notes to query "the experts". Although I have a somewhat aggressive set up I'm not flexible, I have a poor back, and my bike is set up mainly for me to be on the drops (that's the most comfortable position for me on longer rides except when climbing out of the saddle).

My frames were $650 and $750 respectively (including overnight shipping - $90-100 each, paint, hanger, etc), and I negotiated the price up to about $850 each? I don't remember my total outlay but I felt the builder was shorting himself. I think he's getting a bit more than that now. I used a fork off one of my other bikes (Reynolds Ouzo, so a good one), got a 3T team fork (excellent) for the second frame, then got an Enve 2.0 fork (almost as good but much easier to install) when I had the original frame altered by the same builder (shipping cost 2x the actual alteration, I had the frame painted locally by a friend).