Tube amps under $7500

I did it several times on the ST-100 when I had it and it’s super easy to do. Bias meter is built into the amp. Screwdriver is inside the amp as well. Flip the switch on each tube to “bias”, use screwdriver to turn the pot and look at the meter to align the needle on the proper value. 
It takes under 15min to bias those tubes including removing and replacing the cover.

Depending upon the amp tube biasing can take all of a couple of minutes so maybe consider that

You are correct on your assessment of Rogue. I would look at used Audio Research like the Ref 75SE. Or actually a used VT80… even better. It has auto biasing. I do not tube roll with ARC, they are designed for a very specific natural, musical sound… carefully matching real music.

+1 to VAC and Conrad Johnson. These all are higher end solutions.

Biasing: thing is, power amps are huge and heavy and live in a dark spot down by the floor where I would need to crawl like a reptile with a flashlight more often than I find comfortable for normal maintenance jobs.

No crawling around ever required with contemporary ARC.