Thanks for the detailed description.
For any fertility
drugs to act optimally you need to have an ideal BMi i.e 18-24.
You and your husband are obese
I recommend you to reduce weight.
Even 5% reduction of weight doubles your chances of pregnancy
ICSI is a better choice after 6 cycles of failed IUI.
This will also help since your husbands semen analysis
shows motility defects.
Hope this helps,