Great idea to do it when DH will be off work and you'll have all hands on deck. I think 2 weeks is definitely long enough to crack the worst of it.

We successfully nightweaned our DS by having DH get up with him. He would just cuddle him and rock him until he fell back asleep. He cried for about 45 mins the first night for each waking (2? can't remember) and it reduced progressively each night. It took about 5 nights before he stopped crying altogether and it was about 2 weeks before he started consistently sleeping through. He was about 22 months old though, so a little older than your DS. At about 25 months or so he started nightwaking frequently again, and so ended back up in our bed. However, as soon as he was back with us he started sleeping through (11 hours) without fail, and has done for the last 6 months. For me, even though we didn't get our bed back, getting my body back and a full night's sleep made the world of difference to my own sanity and therefore the time and energy I had for our relationship. I think the reason DS started waking is that we also moved him from a mattress in our room into his own room at the same time.

If you do decide to stick with getting rid of the dummies at the same time, but then find that one/both are really not coping with all the changes, maybe you could bring them back into the picture while sticking with the rest of the plan. I don't really know because I have no dummy experience, but I'm just thinking that they might adjust quite well if they've still got their dummies but be absolute nightmares without them and make the whole thing really difficult to stick to, IYKWIM. You can always tackle the dummies at a later point once they've settled into the new status quo.

It'll be hard, but well worth it. Great idea to write your plan down. Maybe it'd help to have a couple of back-up compromises written into the plan so that if you're both at your wits end and about to cave, you can implement those rather than breaking from the plan altogether (like bringing the dummies back in). Maybe have a defined point when you'll implement compromises, like 'on the third night if the crying hasn't reduced in duration' or whatever you think you and your little ones can cope with. You probably wont even need these compromises coz it'll be getting progressively better each night, but if you've thought about the details, it'll help to keep you on track and know what to do if any hiccups arise.

When it gets hard, stick to your plan and just think of the blissful sleep that is in store when it's all over!!!!! I really hope it goes well for you.