I've done this in 2 homes now in the last 6 months. 2 lines of 10/2 under the house through 50 ft of crawspace, commando style. I recommend assessing how much physical pain you're willing to endure vs how much money your electrician will charge.
Dedicated line questions...
Did a search, but can’t come up with a good answer. I am considering the install of a dedicated line. The general consensus is a 20amp circuit. How does this rectify with a full system designed around 15amp components/cords. I already have PS audio receptacles, and have upgraded/cleaned up all the other outlets on the current circuit, but it is still noisy. Would installing a 20amp circuit require a refit of gear or just 15-20 amp power cords? I don’t run big mono’s and really only need one line. Would a dedicated 15 suffice? Yeah, fairly clueless in this realm.