Technical water is man made ponds with multiple points, islands, and channels used to train advanced principals.
Like decheating, or multiple exit/entrance retrieves.
Kelly farms is huge maybe 1500 acres with many natural ponds and rolling hills. I don't know what access costs the clubs but I believe it's only a couple thousand dollars a year. Kelly farm offers different terrain than CMNRC or Benton Retreiver grounds. Many guys myself included belong to multiple clubs to have access to multiple facility's.
Benton Retreiver grounds has a system of dykes/damns and culverts that connect all the ponds to a commen well that runs 24/7 during dry periods to keep the ponds properly filled.
They all have pluses and minuses. Now if you want really nice grounds..... Some of the local private grounds are unbelievable. Access is tough and you better be ready to shoot fliers or plant blinds all day to run your dog. Trust me it's worth it. Pens full of ducks, pheasants, pigeons, manicured grass, knee high grass, cattail stands. These places have it all.