yeah i think so..a lot of planning, alot of logistics, etc lol still thinking.....
It really depends on individual,if u are those type don't like planning,just walk around and visit whatever u saw,ok mah.
Just book your hotel in advance,together with air tickets.Food,just walk around and see food court,then go jiak loh,or some restaurants
insurance,u can buy yourself if u want for that trip
Bring more cash,yes i know debit,credit card can use but some places accept cash nia
Tax refund,u don't know,can ask the airport staff for help,just keep all your receipts with u,don't throw away