I have got 3 'Sufferfest' videos and a dronky old TV that I got by making a donation to a school charity... great in the garage on turbo! Work like a dog without having to take the time to actually GET to the classes. 'The Wretched' - as close as I've ever come to vomitting on a bike - Different timings and paces - sad I know but does the trick and more versatile than a class- 'knowing' the course also means you can goal set to work harder or cut it off as you please.
Do have a spare wheel with 'quiet' turbo tyre which helps alot!