Dude, I'm sorry but they are 1300.00 on the website and not hard to buy. There is no advantage to an in hand S9. I'll sell some of mine for $3,200 too!!

If you dont vent the area you are mining in, things will overheat within a few hours of turn on. You NEED active airflow to keep things cool.

L3 = 900w space heater
D3 = 1200w space heater
S9 = 1500w space heater

You have to look at the units like that and plan accordingly.

Another person with useless advice. You can mine on a dial up modem it uses so little bandwidth.

Dont waste your money.

The largest bitcoin mine in the world can theoretically run their outbound connection over a single piece of cat 5. Mining uses that little bandwidth.

You also have to remember those older miners were using much older manufacturing technology. As the dies shrink on the ASICs the problems increase. You cannot company any miner made in the last 2 years with anything older, its like apples to oranges.

With such a tiny farm there really is little need for monitoring software. There are many pools out there you can set to send you downed/slow machine alerts via email.

As far as mass pool changes there is actually a bitmain tool linked in another thread that will do whatever you need. You can use it to pull live stats from all the machines as well as re-pooling and a few misc changes I did not list.

Mining solo is a terrible idea if you want regular profits. Using nicehash is just as bad since you are basically giving them a portion of your revenue for no reason.

You can literally run 50 miners off of an ISDN connection, there is no need to run an internal proxy or anything else like that with your setup.

I wouldnt recommend any of the mining software you mentioned (minera, cryptoglance, awesome miner) because they are either made for a home user and do not scale very well when you run a fair number of miners. Others just cost too much and are inflexible with their licensing at the large scale.