That power supply in picture is not Bitmain APW3.

This is BITMAIN APW3-12-1600 --> see this official thread https://bitcointalk.org/index.php?topic=1060439.0

Bitmain APW3-12-1600 is suitable to use with Antminer S7, S9, R4 and T9 (any model) if your voltage is 208 V or higher.

I got my faulty 8.7Th/s unit fixed back here in Finland and mining smoothly again so far  

Smooth delivery via Fedex, no need to deal with customs.

Don't worry, I know what I'm doing.

And as said the current is about the same as with the stock fan.

No problem, happy to help  

If you have few miners I would give advice to have at least one spare fan all the time.
That way there is only little down time because of faulty fans.  

And this is of course for the 120mm fans. I have those but no R4 fan because that is god damn hard to find  

There are different size of extension cables available
for example https://www.amazon.com/extension-cable-Black-Sleeving-FC44PWM-12BKS/dp/B0055OLY88

take measurements and see what fits the best

This is a good one, I used to have AvalonMiner 6.0 equipped with this.
Sanyo Denki SAN Ace 120 3.0 Amp 12 Volt 120mm PWM Fan 224 CFM
https://www.amazon.com/Sanyo-Denki-SAN-Ace-120mm/dp/B00QWB1X3O/ref=sr_1_1?ie=UTF8&qid=1488887739&sr=8-1&keywords=san+ace+120

edit:
here are technical specs for that fan https://products.sanyodenki.com/en/contents/hp0071/list.php?CNo=71&ProCon=1266
Max. speed is 6400 rpm and max. air flow 224 CFM which is plenty enough for both front or rear fan.

Yes. Replace the faulty fan.

Those are in ok limits but your ambient temp is freakin' high! 

You need to do your own calculations based on your costs (electricity etc.).

Also there is already lots of info here at the forum because everything has been asked like 100 times.

Actually they just mean that the customs value is written 90USD, so no 90USD additional cost if I understood your text right.

And yes they are legit, I have bought two S9s from them successfully.

I just imported a new car for me from Germany myself and drove it all the way back here Finland.
Could importing a car yourself be an option?

Buy from them directly. http://www.baikalminer.com/

There is also a group buy thread in the altcoin section.

Well my faulty R4 is now fixed and on the way back to my place. Fedex has it in Cologne (Germany) at the moment.
No details about what was repaired though.

PSU --> Server PSU by IBM or HP with a breakout board and PCI-E cables. Bitmain APW3 is also a decent PSU.
UPS--> Eaton has good UPS solutions.

Please pay attention to your total costs for mining during the whole life time. The need for UPS may kill it for you.

I had only Antminer S1 and Antminer S2 pointed to solo.ckpool during that time, so it was extremely lucky.

Kano or Slush for example..

This has been asked here hundred times, why can't you search existing threads? https://bitcointalk.org/index.php?topic=1790875.0

The answer is no. Bitcoin mining is done with ASIC gear these days. With PC you will get few satoshis per month, it is not feasible.

This miner is also available at www.eastshore.xyz including PSU, for a reasonable price.

With the current price for Bitmain Antminer S9 it doesn't make sense for most to buy one and mine.

You need figure out your costs for buying miner and PSU and other stuff possibly, running it and then estimate possible ROI time with calculator available online.
See bitcoinwisdom.com's calculator for example.

Are you talking about KncMiner?
Yeah that was a disaster, at one point I was glad that there was a manufacturer right in the neighbour country but I'm glad that I stayed away after all and have bought mostly Bitmain and Canaan Creative (Avalon) gear.

Nice to hear. 
Did you get the powerline adapter working too?