AussieNomad,
I’m sorry you’re experiencing pain from your arthritis.
I’d recommend taking a taxi directly to the Alhambra. There’s a special entrance for taxis at the ‘Puerta de la Justicia’ (Justice Gate) which is the entrance closest to the Nasrid Palace. Check here for details about the layout and a map of the Alhambra
The Alhambra website mentions that there are wheelchairs available but (unfortunately) they can’t be reserved ahead of time.
And they may only be at the main entrance.
I’d suggest calling the Alhambra to find out if there are wheelchairs available at the Carlos V Palace (near the Justice Gate)
When we visited the Alhambra, I was concerned about my mom since she was 88 at the time. I had planned our visit in advance and had studied this map
The blue lines indicate the wheelchair accessible route.
My mom didn’t have a wheelchair but we did start our visit at the Justice Gate (we took the mini bus but I saw taxis driving into the Alhambra complex by this entrance)
After visiting the Nasrid Palace, we took a quick look around at the Carlos V Palace, then walked to the Generalife Gardens, but it was quite a trek for her.
Do consider getting a wheelchair if possible.
Perhaps you can rent one in Málaga? Perhaps your hotel may have one you can borrow?
It’s unfortunate that your visit to Granada is so short, but do make the best of it!
Edited to add:
Here’s a more detailed map of the Alhambra. Taxis enter through the ‘Puerta para carros’,
(62 on the map, to the right of the Justice Gate)
Make sure you mention this to the taxi driver.
I’d also suggest you ask the taxi driver if he could pick you up later to take you back to the bus station.
I did this when we visited Córdoba. We took a taxi from the train station to the hotel and asked the taxi driver for his phone number.
A couple of days later I called him and he drove us back to our hotel after sightseeing but I asked him to give us a tour along the route back to our hotel. A couple of days later he drove us to the bus station.
I forgot to mention that we skipped the Alcazaba while at the Alhambra.