1st option:
Check out VanDenHul CV125 bulk speaker wire on their web and take 60' which will yield approximately $400 if you will terminate them yourself.(Acquire crimping tool from parts-express $45).
2nd option:
Get Analysis Plus Theater 4 wire/cable that has 4 14AWG sranded and isolated wires inside one cable tube that will certainly fit your budget as well and will be quite "under-carpet friendly".
Check out VanDenHul CV125 bulk speaker wire on their web and take 60' which will yield approximately $400 if you will terminate them yourself.(Acquire crimping tool from parts-express $45).
2nd option:
Get Analysis Plus Theater 4 wire/cable that has 4 14AWG sranded and isolated wires inside one cable tube that will certainly fit your budget as well and will be quite "under-carpet friendly".