Using a DLSR in the 'burbs can give good, but not great results.
This was taken with a Canon EOS Ra
Living in Sydney's south, I found the sky glow would really flood any faint stuff after a minute. The lack of well depth, lack of cooling and lower QE compared say mono cameras all conspire to limit what you can do.
Many problems go away if you use a cooled, low read noise, high QE camera...particularly with narrow band.
See here for example.
But to answer your DSLR question. 1-2 minute subs tops. Stacking gives limited signal depth improvement after 30 or so exposures.
Under a dark sky the faint stuff is very easy to capture. 5 minute subs would be totally reasonable.