Standalone farm do have many advantages. Especually a pioneer farm in few KM radious. There're first day open sound same night got birds stay overnight case.
People choose urban area to build mainly because land price is cheaper. Vegetation come second. Low profile if the site is a distance from the main road. Since there's no guidlines from the authorities on how we should build our standalone farms, building it can be very cost flexible. Lots of cost can be saved from buiding 7-8 feet each floor only. Walls without cement plaster, some plater single side some no plaster at all. Lightweight bricks for 2nd floor onwards wall etc.

In standalone farms people can't play with your bird. There's one real life case where a 4th floor new farm next to a 2 floor old farm which is already fully populated. The owner stay at the 3rd floor below his new farm. One of his "copyright" method to get birds into his new farm is open his 3rd floor window, spray shelltox into next door 2nd floor bird entrance EVERYDAY!   

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Added on September 14, 2007, 8:28 pm
Delay knob is useless for farming. It's mainly for playing audio with lots of musical instrument sound. Adding some delay would add a little realistic feel to it.

Advantages of urban/ulu land standalone farm:
Cheaper land and land not suitable for business usage anyway.
Lots of vegetation and no competition.
Low profile (very important)