Depends upon the size of the interferometer.
2 aspects to size.
1. the baseline...how far apart in Km the telescopes are...this determines the angular resolving power
2. the individual aperature size and # of the individual telescopes...this is important because these photon buckets have to be big enough to grab a couple photons to see faint objects, and these are faint targets you're after

To do what you want to do will require much larger instruments than are even planned. Note that in every case the real space telescopes are invariably deployed many years later than "planned" and they are invariably smaller in aperture. The space astronomy science budget is finite and not top priority.

-p