Upvote:1
Get a VISA up front, there are plenty of agents who can help if you do not want to do it yourself.
Then take the train from the Station next to the Sheraton Towers on Kowloon side, I dont know the station name unfortunately but they have accessibility entrances.
Once you reach the border you go to the VISA part and realize your visa and then pass immigrations and voila, you are in Shenzhen.
Upvote:1
Aside from taking a cab straight from Hong Kong airport to Lo Wu station, you can use the train as follows:
None of the steps require going through stairs: they all have escalators and I'm quite sure they all have elevators as well.