I would like to know what number of space telescopes, ideally mass produced ones using current technology and that could be cheaply manufactured and launched en-mass via the future SpaceX BFR. How many and how spaced out would they need to be to directly observe planets of the closest say 100 million stars in out galaxy?
Secondly assuming a good design can be created and enter into mass production how would their resolving power increase though signal combining via interferometry as is already done for radio telescopes on earth. Surely in space 10 to 100 to 1000 or even 10,000 would collectively improve resolution to astronomical scales :)
Note I am suggesting cheap telescopes that gain ability through numbers and trying to understand if this option might be more economical and produce better results than a few very expensive space telescopes. This whole idea is based on the idea that BFR is 100% reusable and can haul much more into space at a much cheaper rate. This in essence is an economical question on how best space budget money might be spent. Quantity vs quality, I am assuming resolving power improves better with quantity.