I'd say go for it. Rebuilding PT heads is my current method of
vaping.
When I was moving from smoking to
vaping, my first priority was to get a good vape, because I knew that if vaping didn't give the same tactile feel as smoking (or at least approximate it pretty well), that I'd go back to smoking. Second priority was to have a low-maintenance method, because if I knew that if I had to constantly fiddle with my equipment to get a decent vape, I'd lose patience and go back to smoking.
I started out on Vivi Novas, but the super tight draw and the constant leaking and gurgling prompted me to try something different. I moved to the Protanks with the stock heads, and got better airflow with less leaking and gurgling. The stock heads were easy to clean - rinse, remove the flavor wicks, dry burn, and reassemble. When they wear out, pop another in. I was content with this for a while, but I still wanted a better quality vape. I never tried rebuildable drip atomizers because constantly having to drip seems like it would be annoying, and even the rebuildable tank atomizers seem like they'd take some doing to get together and working between cleanings/refills. I wanted something I could slap together and go.
Like you, I saw some videos on rebuilding the Protank heads and decided to give it a shot. I'm glad I did. It's surprisingly easy (especially with a
coil jig, which you can make yourself) and improves the performance of the Protanks - I don't get any leaking/gurgling anymore. It's easier to change flavors too - rinse off the head, pull the wick, replace it, and you're good to go (I don't need or use flavor wicks). I run two tanks at a time, each with a different flavor, and I have to rebuild my heads about every week to a week and a half due to gunked coils (can't dry burn even if I pull the cotton wick, as it will melt the rubber insulator in the head). Rebuilding both heads takes me about 20 minutes; it does take some practice, but not much. Plus, you can vary the resistance (ohms) of the head depending on how you wrap and what you wrap with, so you can customize the vape you get. Oh, and cotton wicks much better than the stock heads' silica.
If you do decide to try it, I suggest this thread for more info:
Protank Microcoil Discussion
And here's a couple videos on how to do it:
Nano Micro Coil build for Kanger Protank 2
Micro Coil and Cotton Protank Evod Head Rebuild
I personally use 30 gauge Kanthal wire around a 1/16" peg on my coil jig with 8 wraps, which comes out to around 1.6 Ohms.
And yes, it's cheaper and easier than buying new heads all the time. One spool of wire, a single bag of organic cotton balls, and some household tools will give you enough materials to rebuild these heads for a
long time.
I think one day I will work up to building my own could and such. As for now I just want to do it the semi easy way 
