Do it! But be prepared..have a method of attack in mind!! LOL
I do home childcare and had a lovely parent approach me a bit over a year ago, regarding her then 27 month old son, who had never ever gone potty before other than in a diaper, about a 3 day method she had discussed with co-workers. She is a very academic gal (works at the local university :-) and she got the materials, we discussed it (Dad was overseas deployed, so it was her and I)...and we decided to go for it. Really it was her and little boy and I was just to support the results of their 3-4 day weekend.
But she took a full day and time that previous week to prepare. She used the ideals set forth in the Lora Jenson 3 day method. Basically its like potty boot camp. You toss ALL diapers and pull ups. Have several bed sets/sheets ready..they wear undies and tshirt and socks..no pants...you stay at home and very physically close to your child the entire time. You do NOT make them sit at timed intervals. You have about 20-30 pairs of undies, some easy meals planned and already shopped for (casseroles, sandwiches and soup, frozen pizza and waffles...simple simple) and no place to go, cleaning projects or whatever to do.
And it works...the youngest of my crew was a 22 month old girl. The rest were boys ages 24 mos-28 mos and every single one was successful within the 3-4 days..at least with pee stuff. Sure some accidents happened..but not many. And they tell us ..every..single..time...no timed intervals of making them go sit.
Most regressed back to diapers for nighttime as parents just needed it, or kids did due to stress at night. for some the poo part took longer. But the daytime pee stuff...in the bag! No one ever went back to diapers or pull ups in their 8-10 hour days here with me.
Either time frame you decide on...be prepared and you both can be successful.
Good luck!