Equipping and speed tuning took an evening and about 25 million silver.
I had the suggested speeds from DeadwoodJedi's site and then used the calculator to play with speeds until I got it working on Ultra, Nightmare, Brutal and Hard. The gear optimizer from Hellhades made hitting those speeds a lot easier, although I had to go in and upgrade a number of pieces from 8 to 12 , and a few rare banners to 8 to try and hit speed numbers. I got most everything that wasn't at 16 to 16, and have been upgrading a piece a day or so since from 12 to 16.
As far as how long it took to build the team? It was a long time.
So I have been doing unkillable for a while, but it was the standard 1:1 speed Two Towers comp. That comp was both of my Towers, Frozen Banshee, Anax and Doompriest. I had tried getting my Skullcrusher in there, but it didn't increase my damage too much at all, and without Doompriest, it was very hard to get a clean run where Tower wasn't taking a stun during the setup. So I was stuck at about 35mil damage on NM per key and less on UNM.
Once I settled on trying the Bateater comp with my Roshcards, I had to get Seeker leveled, booked and masteried and Kreela leveled, booked and masteried. To be honest, I'm nowhere near done booking Kreela. I thought about trying Warcaster to cleanse a sporadic stun here and there, and started working on him, but put him to the side. I ranked up my champs slowly but surely, all the while collecting silver.
I used that silver to rank up a bunch of gear to 8 and 12 to try and see what would hit the new team speeds that would be required without sacrificing too much damage from the team. Basically 3 champs at about 250, one at about 265 and one at 220. And all of these champs would need high crit rate, high crit damage, and Anax was going to need accuracy on top of that. So it took a lot of sorting through gear, leveling things to see how it would roll, then selling what didn't roll well. I didn't plan on manually equipping everything, but I wanted to give the optimizer a good selection of Perception, Cruel, Speed and Accuracy pieces to choose from. Since I've been hitting CB religiously, I also had a lot of Cruel gear to look though.
I tried to run the optimizer about two weeks ago, hoping I had leveled enough gear. But I couldn't get everyone to the speeds and gearing they needed to be, so I ran spider20 with my 40 autos every night, selling everything. I used that silver to rank up a bunch more gear in the hopes I would get enough speed to make it work. And this time, I was able to. Knowing this, all I had left to do was get Seeker's masteries done, and instead of farming it, I had just enough gems to buy them. Maybe I should have farmed them, but I was excited to get done.
TLDR: Speed tuning and equipping took an evening and a ton of silver. Building my team took a little over 2 months from when I decided to do it.
Any other questions, Harbby?