Agree with Robin about the single tube version except to the left of the 40uF.
I’ve only built the single tube version and those resistors (can’t make out their values) are not in mine.
My cost for everything except the cabinet was around $350 (best I can remember). I bought the chassis kit and some sozo’s from webber. The rest of the electronics I bought from Antique Electronic Supply. I use one Eminence Wizard speaker bought locally.
I’m not a wood worker so I have to buy my cabinets. I used Mather Amp Cabs. $225 + shipping for a Princeton Tweed with a 12″ speaker instead of 10″.