Cost break down of hifi system

I think of cables/interconnects as a more-or-less fixed cost, not as a percentage of the total system cost.  Blue Jeans Cables sells  Canare 4S11 speaker cables, terminated with locking bananas, for $5.90/foot. This might be 10% of a starter system, or less than 1% of your end game system.  

If you think you can hear a difference between the Canare 4S11 and something many times more expensive, well, maybe you can. I suspect all you're really hearing is a difference in gain resulting from a change in length, gauge, or termination quality,  Granted, a system may sound better (not just louder) at higher volumes. Usually, there's an app (or a knob) for that. 

Put most of your money into the speakers! Audio electronics have been transparent to the source for several decades. Paying more just gets you more bling - no real sonic improvements. I suggest getting a pair of Genelec active monitors and ditching the amp. Expensive yes - but you could spend that much just on an amp and have nowhere near the sonic quality of the Genelec's!

Given that you have speakers and amplification. The next step is to decide on the source components. What media will you be using?

I would then get some budget cables and set the system up. Run it for awhile and get to know it. Adjustments inroom treatment, cables, and power (in that order) can be made therafter.

Forgot to add: Source components should be commensuate with amplifiecation and speakers which are excellent IMO.

@shtr74sims 

Did you mean you are actually constructing your room right now or just prepping an existing room? If you are building a new room from scratch like I did I HIGHLY recommend consulting an acoustician first ! If your room is smaller like mine a professional can design it so it can punch way above its weight. Im so glad I went this route. Jeff at hdacoustics is excellent and very reasonable for the design cost. You won’t be sorry. Good luck ! 
 

After the room I would do speakers then components then cables etc