I would like to know which part of stackexchange is most suitable for posing a question about credibility of offshore medical schools, their accreditation and acceptance in USA and if it is easier to get in residence program via them faster and easier in contrast to regular outside of USA graduate procedure? DO YOU think maybe expat forum or medical forum can be suitable?
Medical school is a form of postgraduate education that is certainly within scope of this site. Asking for evaluation of particular schools would not be, nor would asking something highly opinion-based like "which is better?" or highly personal like "which is easier for me to get into?" Accreditation and acceptance in the USA would be on topic.
Note that your questions might not be answered as quickly as PhD-centric questions, but that should be no barrier to asking them.