Depends on the weather. Where I live, most days we still cannot fly due to icing concerns. I used to live in California, and I was able to build 200ish hours in about 4 months.

The stress is understandable but as pilots it's really important that we don't allow external pressures to force us to fly.

I'm not sure what your financial situation is but if he finds someone to split time with him it would lessen the burden by a substantial amount

Doing a commercial in 4-6 weeks is completely doable, but it's important to note that your husband won't really be employable unless he gets his instructor certificate, hits 500 hours, or gets an aerial survey job (which probably won't happen since he would then be gone for many months)