You can get bath seats, which rise, twist, and lower into the bath, if it is just a means of keeping your husband able to have a good soak, so that would be a possibility. (And reasonably priced)
A wet room, though, might be better.
You can get a shower cubicle that allows someone to assist the person without getting wet themselves, and M0nica's link looks excellent, with the bonus that she knows someone who has used the company. (Testimonials also say how quick the work is done)
You could ask occupational therapist to visit, and you may qualify for a grant towards the cost, or even the whole thing done for you.
I wouldn't proceed with your current potential company until you've checked out other options.
Your husband should get an O.T assessment before being discharged from hospital, as well as six weeks of care.