Best Way from airport to Nathan Rd, Kowloon

Hi there,

My arrival in Hong Kong airport is 530am with a total person of 2 adult and 1 child, can you advise what is the economical to travel to hotel? MTR or taxi?

1) how much does it cost to travel from airport to Nathan Hotel via MTR?
2) how long does it take from airport to Nathan Hotel via MTR?
3) Via MTR to Nathan hotel = do we need to change line? and with luggage convenient to take MTR?
4) Any hotel recommendation that is near MTR and cost around USD 100+ per nite?
5) We are going to Macau on 2nd day n 3rd day and back Hong Kong on 4th day, do you think we need to buy the Octopus Card? Will it be more cheaper to buy 2 or 3 days or single ticket?

Thanks
Cherry