This one (Cutting board with bird inlay (purple heart, black walnut, maple)) took a few hours. Cutting the wood, planing and gluing always stretches over a few days, because the glue has to dry. Sanding and the inlays take the longest, because sanding is just tedious with hardwood and takes ages, with the inlays there are always problems. 
Now that I’ve fixed my Z issue and Estlcam 12 has been updated to do carves correctly, it isn’t going to take too much time either though. You can find a complete walkthrough of one of my last boards here:
I am also still working on a guide on how to do those deep inlays with Estlcam. I’ve recorded it three times now because I always mess something up… 
Won’t be long though… cough