I'm not interested in space tourism. That is someone elses department. I am interested in asteroid mining. It will be a business operaration with permanent staff stationed in space at a few critical locations, and most of the staff right on terra firma. There will be no need to ferry hordes of people to and from space. A few crews, perhaps 16 crews, with a staff level of 10 each will suffice. Most will travel into space and return one time and will stay in space for a few years. The work will be similar to hard-rock mining now: dangerous, highly technical, highly skilled, and boring as snot. Most workers will be able to retire after one tour in space and spend the rest of their lives impressing the impressionable at any seaside resort of their choosing for the rest of their life. Space launch capsules will suffice.
That isn't an industry, it is a niche. Besides, I cannot find it believable that space mined minerals will be economically useful anywhere but space. Mining enterprises can barely stay in business on earth where the operating cost is a fraction of what it will be in space and the demand exponentially more than any in space will be for a long time.
Mining won't lead the way into space. In fact, no one has positively identified any economic interest in space other than satellites.
More than likely, space will be colonized when it becomes imperative to grab the high ground before someone else monopolizes it.