Do you need a floating lift or a stationairy lift? The most economical are hand cranked lifts and you go up form there to power hydraulic lifts. I have a Hewitt and ordered direct and assembled myself to save some money, but not sure there are big differences between the companies.
Thanks bmartin, i live in south America, and over here it`s not easy to find pre-made lifts like those in that website. I am on a river so i think a floating lift would be better. If someone has any more ideas it would be very apreciated