I’m so sorry to read of your news MrMichael, what awful news to receive and I admire your courage in dealing with it. I’m not sure I could be so brave. I shall be thinking of you and wish you all the best going forward.
I just checked the Shard website:
and they have some good offers close to your budget. These offers are also better than those found on Booking.com etc.
My knowledge of the south coast is limited to the Hythe area, but I’ve yet to find a stunning hotel with sea views.