Your issue probably wouldn't be mainly physical or geographical structures, though that is obviously a factor... your issues are going to be the EM environment being extremely noisy... after all, we're trying to detect a specific noise' finger-print in a very noisy spectrum..,., 3-300 kHz with 3-30kHz being about as narrow as we want to get... most of the sferic's energies will be between 8-18kHz..but the higher freqs are very important..
Do a walkaround test: Take an AM portable radio.... tune it off station, start a low end, and do a slow walkaround... gradually sweeping through band off stations, ... if you have a lot of noise... then your area may not be 'clean' enough for long distance, but may be ok for shorter distance (using reduced gains/ higher triggers) to keep noise sources from overloading signals...
Generally, the E field probe won't be affected by magnetic noise, but will by 'arcing' or other 'electric' discharges, including lights, etc... some junk isn't there all the time either... it's circumstantial, or sporadic, and changes with time of day, weather conditions, and season of the year... .
Generally, the H field antennas will be affected by both... and shielding them is not necessarily productive if the noise is 'near field'.
...and you don't know what noise generators are in and around all those building... many 'killers' are not obvious.
...but if you hear lots of stuff other than 'white' noise on an AM radio, off channel, then you'll have an idea what you may face.
If you do decide to order, you might PM or email me first..

Mike
Oh... might take a quick look at this page:
https://frankfortweather.us/fwxBLPublic/