I've definitely been putting it off with DD2, with DD1 we potty trained at 2.5 over the summer, but as DD2 was 2.5 in deepest winter, I couldn't face dealing with the mess and stress when we're indoors/all bundled up. Tried again at Easter, she was very resistant. About 4 weeks ago she turned 3 and I spoke to her nursery, they were very supportive of it, so we just decided to go cold turkey, no more nappies.
I haven't been able to take any extra time off to do the whole week bare bum method, but we've stayed very close to home in the early days so we'd be close to a toilet. In the first couple of weeks she had daily accidents at nursery, but they're very patient, and her success rate is improving. She's now better with wees, and will tell you 75% of the time when she needs one, but she gets distressed by the idea of having a poo on the toilet.
At this stage, I don't think there's really much in terms of advice, it's just a matter of decide to go for it, and commit to it. Be prepared to do lots of laundry and throw away pants that are beyond redemption.
Can you use the bank holiday at the end of August and a couple of days of annual leave to have 5 days off in a row and get started? If nursery are supportive then once you've had a head start it might be okay.