My husband has a wheat allergy, but he can have flours such as spelt, soy & rice flour. I was thinking of investing in a bread machine to make this special bread for him. Any advice or suggestions for making it in a bread machine.

Try to search online for "wheat/gluten-free bread machine recipes." I am sure that you will end up with some useful results. As far as a bread machine, I would recomment Zojirushi bread maker.