Opinions on having a door fitted in an existing bath.

I have a bath hoist chair from Social Servicesbwhich goes up and down fairly safely. . Not easy to use , but it goes up and down fairly safely.

Good Luck with whatever uou choose.

I'm very thankful that I have an ensuite shower room as well as a bathroom in my house. The bathroom has a shower over the bath but I only ever used it once when my boiler broke down so I had no hot water and the over bath shower is electric. Why it didn't occcur to me to turn the immersion heater on I don't know! I've struggled getting into baths to use an over bath shower for years and it obviously doesn't get easier as we age. The last time I had an actual bath was years ago as the hotel bathroom had a shower over but no screen or curtain so I was worried about flooding the bathroom. I had the bath then couldn't get out. I had to call my DD in to help me - thank goodness I hadn't locked the door - but it was embarassing for her as a teenager to have to help her mum in this way!
If you don't have space for a separate shower and your Husband wants to use the bath I'd go for the door option. If you are using it as a shower, waiting for it to drain won't be an issue as it will drain as you shower. Presumably your husband will still climb out as before so won't have to wait until it drains. If in the future he finds climbing in and out a problem then he can use the door and will just have to put up with waiting for the water to drain. Even if your mobility returns in time I'm sure a door will make it so much easier for you anyway.

I don’t have a problem getting into the bath.
But it’s getting increasingly difficult getting out of the bath.
I can just about manage it. But for his long.

Don’t think I could afford to convert to a a walk-in shower even if i wanted one, unfortunately.

A replacement shower is the long term answer. It’s not just the getting in. It’s the problem of getting out.

I recommend anyone considering a bath lift to look at the MOLLY BATHER BATH BELT. demonstration video.
Very, very safe and easy to install.
We are thrilled with ours and have used it for many years.

When DH became frail, he still liked to have a bath, which was all right because I was there to help him get out and make sure he didn't fall.
The AC saw how difficult and dangerous
it had become, and after DH died they suggested forcefully that I should have a shower fitted. I was resistant as I'm pretty spry and agile - for now. But I have had a shower put in and it's okay. It makes sense.

I had a U-door fitted in my existing bath. I never have baths, and it was much cheaper than replacing the bath with a walk-in shower.

Having had a shower room in our last house I wouldn’t again! Water gets everywhere, even with a curtain and it’s a chore squeegeeing then drying the floor properly so the loo is usable for others afterwards. An enclosed shower of some sort is so much easier.