i was thinking about you earlier, sparkle as i have had a few more ideas, well not mine but we did this at speech therapy and it worked really well. Two games we used to play were:
The little puzzles that you can get from early learning centre, the wooden ones where you slot pictures of animals, shapes etc into the board. The shapes were put into a cloth bag and the children had to fish one out and then be asked what they had before they fit it into the puzzle. If they coudlnt answer, most of them couldnt at first, they were given choices, is that a dog or a cat etc. This apparently works on aa few levels . It teaches turn taking, which apparently is very good for speech development, and it is giving lots of words, and it is fun Also, placing the puzzle peices in is good, i have looked into this and have read that dyspraxic children may battle with this sort of thing, but good to practise.
The second game was post box: Little laminated pictures like letters, themed is good, we had food, turned face down, children took turns to pick them up - then its "oh, what have you got- is it a banana or an apple (signs made too), ooh look lucy has an apple, post the apple, bye bye apple"
Regarding your working i am a SAHM, my dd still has speech delay (it is improving so much now). I don't think you working 2.5 days a week will be of detriment to dd, in fact i think it is a good thing, what are your childcare arrangements? Does she get to stay with other children, lots of children really benefit from this. I really really dont think you should give up your job - it would add more stress to the situation and your dd would benefit from seeing other people. I am a real SAHM supporter but a part time job i think is often better as it gives everyone a break.
Why do you think your child may have dyspraxia? I was worried about that with DD but i have all but discounted it now.
I am no expert by any means, im just going on my own experience with DD.