Dear friend
The following meter can solve your problem.
1] TOU meter from GE[USA] type 10A vector meter.
2] TOD meter Schlumberger [France] type A21E.
They all have [ Export + Import ] and [Export - import] facilities.
I mean can be programmed according to your requirements.
Mazhar...
42 feet galvanized structures are best for your requirements, using three disc insulators you can string the line.The errection is possible through tripot ,lifter or even through hands.
Mazhar Ali