  Proposed next-generation networks of gravitational-wave observatories include
dedicated kilohertz instruments that target neutron star science, such as the
proposed Neutron Star Extreme Matter Observatory, NEMO. The original proposal
for NEMO highlighted the need for it to exist in a network of
gravitational-wave observatories to ensure detection confidence and sky
localisation of sources. We show that NEMO-like observatories have significant
utility on their own as coincident electromagnetic observations can provide the
detection significance and sky localisation. We show that, with a single
NEMO-like detector and expected electromagnetic observatories in the late 2020s
and early 2030s such as the Vera C. Rubin observatory and SVOM, approximately
$40\%$ of all binary neutron star mergers detected with gravitational waves
could be confidently identified as coincident multimessenger detections. We
show that we expect $2^{+10}_{-1}\rm{yr}^{-1}$ coincident observations of
gravitational-wave mergers with gamma-ray burst prompt emission,
$13^{+23}_{-10}\rm{yr}^{-1}$ detections with kilonova observations, and
$4^{+18}_{-3}\rm{yr}^{-1}$ with broadband afterglows and kilonovae, where the
uncertainties are $90\%$ confidence intervals arising from uncertainty in
current merger-rate estimates. Combined, this implies a coincident detection
rate of $14^{+25}_{-11}\rm{yr}^{-1}$ out to $300\rm{Mpc}$. These numbers
indicate significant science potential for a single kilohertz
gravitational-wave detector operating without a global network of other
gravitational-wave observatories.
