That is the setup I fabbed for my Yanmar 155D after getting tired of dragging around a rear blade on my gravel driveway. I found the front mount blade to be far superior, at least for my small tractor. I added an adjustable downstop to keep the blade a small set distance above the surface to avoid plowing the gravel.
My setup may vary a little from yours in that I have the mount bolted to the lower 3pt hitch links (with the links pointing to the front instead of rear). The lift/lower cables run through two pulleys per side, front and back, and are connected to the 3pt lift arms.
Cost was about $100 for a four ft blade pressed from 1/4" sheet steel plus a little for some square tubing for the mount etc. I can manually adjust it for a zero or 30 degree angle. I kept the blade as close to the front wheels as possible to minimize side-push rotation and to minimize variation in blade distance from the surface.
If I were doing it again, I would probably eliminate the angle adjustment, and leave it at 30 degrees, as that's about all I require for snow removal.