Hi @helen_flute. I don't come on here that often, so I've only just seen this thread. I took a 56 year break after only achieving Grade 3 as a child. Yet it all came back and better within 6 weeks.
6 months before I re-started I gave our family upright (a Knight K10 - bought new by my father when I was 5) to my daughter, so had to go and buy a digital piano - in the sort of price range you are talking about. Within two months I was finding it frustrating - mainly because the pivot point for the keys was just behind the fallboard, so playing right up to the fallboard was almost impossible an I ended upgrading to a mid range Kawai (CA67). Fortunately the shop I bought the original digitial piano from offered a good upgrade deal so I didn't loose much.
For a while I preferred my digital to the old knight (played when I went to visit my daughter), but my fingers were becoming a lot more sensitive, and in a visit a few months later I suddenly found I was preferring the acoustic to my digital. So since then I've been longing for an acoustic. A couple of weeks ago I placed and order for a baby grand, although I now have to wait until the end of March to take delivery.
I decided I needed a teacher at the outset, and originally planned for lessons every two weeks. It soon came to a point were I realised I needed them weekly, and have had an hour ever since. I have found this a great boost to my progress, I've learnt some great music, although the other thing I have discovered is that its really bad at sticking in my memory, so at the moment my daily exercise is to play Bach's Invention 13, as I worked quite hard to bring it back again after I realised I had forgotten it.