Suggestion for a travel luggage trolly below 5K

Hi all,

I am a family of 4 and want a travel trolley bag with 8  wheels under 5k  for a week duration.

Presently,  I have two aother small trolly bags not suitcases. There are plethora of brands and types. I cant decide on  which one to buy. 

My travel is primarily by train and need to walk on the steps in the railway station if no lift,escalator present. Kindly suggest suitable luggage trolley(suitcase type or bag type) and brand for my requirement. Thanks in advance. @admin @Vrushali.S