I would go with a Bigfoot Quadra system over a Lippert any day of the week. As for the gentlemen that was having problems get his auto level system to work, I do not understand the problem. Once it is set up and calibrated, it should not be a problem.
If the trailer has sufficient frame, a 4 point is fine and should not require a 6 point system.
Another thing about all you can afford is an entry level trailer is stop looking at new units and look at some higher end trailers that are in the 3 to 5 year old range. Have a used trailer inspected by an independent third party RV technician.
A used trailer will give you money for higher quality and you will not have the huge depreciation hit as with a new trailer.
Ken