I also recommend the 3 day method. I did it with Dd1 when she was 22 months and it took her about a week. And just recently potty trained my 26 month old, with my 3 yr old and 5 month old in the house and she got it in 1 day. Seriously, by the end of the 1st day she was telling me when she needed to go.
Maybe you could start on a weekend when your dh would be around to help? I think the older ones tend to get it faster but ate also more stubborn. But this method works really well for independent type kids. Potty training really is a skill that needs to be learned and practiced like any other thing they are learning and consistency is key.
Maegen, happy wife to DH, Mama to three beautiful DD's, Madeline 10/08, Linnea 5/10 and Kara 3/12.