They do sell a kit that is just the full hood and fenders, you mean just installing the fenders and hood and no front bumper??
2018 Tesla Model 3 3M Pro Series Clear Bra Full Hood and Full Fenders Protection Film Kit
I purchased a full frontal pre-cut Suntek kit from Ebay using a 15% OFF coupon that came out to be $624 ($724 -$100) discount.
I too debated whether to go partial or full, so I bit the bullet and went for the full coverage because of the coupon savings ($288 for partial hood and fenders + full bumper, etc). As far as installation costs, I knew that installers charge much more to do the complete hood and fender, so I decided to install the PPF film by myself. I started about two nights ago, beginning with the the headlights to practice. I have no previous experience installing PPF, but I did sleep at a Holiday Inn... J/k LOL! I watched a ton of videos, and I am plastic model/RC enthusiast so applying decals, vinyl, and working with this kind of material wasn't alien to me.
So far I have completed both headlights and the front left fender (Two headlights on Sunday night, left front fender last night). To be honest, surprisingly, the pre-cut kit installs extremely close to the edge or the panels, and it really is up to the installer to determine how close you want it to be the edge (by stretching the material). I've found that that on the initial install, if the film doesn't go up to the edge of the panel, it installs very nicely with no lifting. You need to let the film cure and dry another day for it to give you proper adhesion so that it won't lift or get caught by a towel. If the film goes up the edge and overhangs a little, say for instance the front corner tip of the fender, or the top sharp edge of the headlight, you'll need to wait until Day 2 for the moisture to evaporate and then you can use a clean finger to seal off the edge and wrap it around the edge.
As others have mentioned, if dirt accumulates along the edge of the film over time, you simply need to hit it with a soap solution spray and squeegee the edge again, and that usually will remove all of the dirt. If dirt is getting under the edge, then something is wrong with the install. The PPF film sticks extremely close, and even if you wanted to remove it with your fingernail, it is pretty hard to pick it and lift it.
If you are anal about seeing a line, then partial is not for you. In my experience however, I have seen rock chips on the upper portions of my wife's Lexus RX hood, so it is entirely possible that the partial hood will protect a good amount of debris, but that one time it hits the top of your hood and knicks your paint, you'll be kicking yourself in the pants.
I'm planning on doing the other fender and hood tonight, but most likely will start with the fender because the full hood seems easier to install with simpler contours. I'll report back and take pics to show how it turns out. I know you were interested in the partial hood install pictures, but I'll try to take pictures of the film close to the edge so you can get an idea of what that line will look like.