I think you should insist that your DH comes with you.

RP if you are coming on a work visa does not take more than 4 weeks the most or even less..You need to let your employer know that it can't be longer.

Depends, your DH should get a visa on arrival for 1-3 months exchangeable to an RP once yours is fixed. Not sure how..but it is doable ..ask your employer.

All the best and welcome.