My little girl is 2 in June and baby is due July - so I am at the same point as you - trying to train before baby arrives!
We just started y'day in fact, and if anyone out there has also tried the "take-her-every-20-minutes-the-first-3-days-method", I would like to know their success.
I had my watch timer on to take her every 20 minutes and she did pee, some of these attempts. We had 2 accidents when I missed by 10 minutes, so that is my fault, however it is teaching me about when she goes. I don't think there will be an age that you can potty train and not have an accident on the floor, I am sorry to say, so you husband needs to deal with it now or deal with it later, and try to be understanding.
I am trying to keep her liquids up to enable potty success. For now I am doing undies at home, pull-ups for outings, and naps. She already did not want to wear a diaper again. She is very co-operative with the whole sitting on the potty and trying, so I am staying positive and motivated that we can do this with plenty of time to have a small break from diapering before July Baby comes!
If anyone knows where to get small undies from - please post, my daughter is 22 lbs, and some of the ones we are using from when 5yr-old-sister was this age, have the elastic all stretched out, we had got those one from New Zealand, where I think it might be the norm to potty train by 2 (at least more common).
It has been our philosophy all along to make changes early, taking away pacifiers, bottles, putting her in toddler bed, etc. I think they can adapt quite easily as wee ones after just a day or two of change, whereas once they can talk and start to more assert their independence, change can be more of a challenge, in our experience. But I had not tried early potty training with daughter #1.
So I will keep checking this thread too, thanks for posting T.! I say go for it, and be very consistent and on top of it in the beginning so it is easier for your little to have success with staying dry. I think it would help to sit with her the whole time she is sitting on the potty so she does not get up and pee on the floor. You can hear the pee landing too and be their to offer praise instantly. If she thinks she gets dry undies every time she wets a pair, then she might not get it that she needs to try to keep them dry, so praising for keeping them dry is key. Mine also likes to flush, but I only let her flush if she did something. For now I would also say, don't ask her if she needs to go, just take her a regular intervals, I think an hour or two is too long until you really learn when and how much she pees.