Motor mover advice please

Hi all,

After a lot of stress caused my reversing onto pitches, moving our caravan on and off our drive and generally negotiating tricky manouvres the time has come to look at having a motor mover fitted. Is this a good idea?, any recommendations for new/used, if we have one fitted could we have it removed and fitted to a new caravan in a couple of years if necessary? Any advice would be appreciated.  Thanks