I am looking to purchase a plot (30x40 or 60x40) to build a house at the earliest. I am going through a lot of dilemma, confusion, RE Agents and owners too!

Whichever sites I liked ( 3 of them, 2 of them shown to me from RE agents) had disputes, after spending some time, my lawyer indicated that I would be burning my fingures if I persue towards it, so stopped.
I am very keen in Supreme Residency ( also known as Aleem Layout), this is near Vijaya Bank Colony, Off Bannerghatta Road, Also, My office is in Sarjapur outer ring road, hence I am also considering Sarjapur side ( after Wipro, Total Mall etc), but yet to go explore. I also happen to come across few plots in Royal Lake Front layout, which again happened to be in dispute.
There may be many owners who is trying to find a direct buyer to sell their property at off B.G road and surroundings. I`m interested.

Also, experts here please do suggest what are the set of documents that I need to ask owners for a specific property?
Regards,
SUN