Help spec cables and cords for my system

My system is going to be the Wadia 781i GNSC statement mod, ARC Ref.5 pre, Convergent Audio JL-3 mk2s running a pair of Wilson Sashas.

What would be the power cords and cabling to go for? Please try not to point me to major $$ buys, I'm already struggling to make payments for the above choices.

I can't do much auditioning if at all, so would be buying online, used if possible too to cut costs.

Rack is maybe 6 ft away from the monoblocks which will be placed beside the speakers. Short ICs between CDP and preamp, long IC from pre to power, short speaker cables.

What kind of budget should I be setting aside for a system like this? A percentage would be helpful.

Thanks!