What is the easiest way to add 10+ hard drives to my current setup?
According to my research, there's none on the market as yet. The closest solution for you is probably getting one or more mega USB3.0/e-SATA enclosures with a shitload of bays on each... directly connected to the desktop/server. Last time I checked there was no such thing. Even if it does come to existence some time on the road, I'd imagine heat dissipation and costs being significant obstacles for adoption.
The dilemma is that, at some stage, within that single device, whether it being a beefy server or desktop, the constraints like the physical room/capacity, connectors, heat, and other performance factors will force you to take the networked, distributed approach.
And the biggest problem with a networked solution is obviously the network itself... Let's look at your requirements:
i don't want transfer speeds any different than my regular sata drives I use right now.
connection can be unstable and disconnect occasionally
You can actually achieve these using:
1. Gigabit ethernet aggregation (minimum 2Gb/s aggregrated single direction)
2. Powerful switching backbone capacity (heaps of switches that have gigabit ports do not have corresponding switching fabric to support the performance)
3. SMB 3 / NFS / iSCSI as transfer proctocols
At this level of requirement, it is the networking components that demand the biggest budgets. Switches that will properly support Ethernet aggregation with a beefy backplane performance that deliver all the data transfer at line rate do not come cheap. Early this year I deployed a home theater set up for a long-time friend, the wired networking plus storage part of Bill of Material boiled down as follows:
1. Backbone: Cisco 3750G x 2, @ 2 x $3500 each
Running two 4Gb/s ethernet aggregation via CAT6 cables to two distribution layer switches located in major entertainment hubs in the residence.
2. Distribution/Access: Cisco 3560G x 2 (model with 4 uplinks), @ 2 x $2800 each
Running 4Gb/s ethernet aggregation back to the backbone switches
3. Miscellaneous customer-grade Gigabit switches, @ $2000 total
Uplinking to backbone/distribution via single gigabit link.
4. 6 x ReadyNAS 1500 with 4 x 2TB drives, @ 6 x $2400 each bundled
Connected directly to backbone switches via dual Gigabit ethernet aggregation (maximum uni-directional transfer speed of 2Gb/s)
5. One PowerEdge server, 64GB memory, dual quad-core Xeon with 12Gb/s ethernet aggregation, @ $3500
Connected directly to backbone switches, and thus to all the NAS appliances.YET there's only less than 40TB of useable storage and there's still noticeable performance degradation
when the load is concentrated on a few NAS boxes. There has been no solution, just bear with it.
So... focus your budget on the stuff that you value most, be prepared to make compromises, everybody has to, even for people among craziest of the crazy.
In your case, a few NAS boxes plus a customer-grade gigabit switch is really the best solution.