This is just killer:
"work hard for several years to reach current ranking of my existing website"
SEO is not a plan for success. SEO isn't a business plan. Year after year, following algorithm updates, I've read countless tales of very bright people who were financially crushed . . abruptly and completely thrown off court because they were ill-prepared for the predictable . . inevitable . . changes in Google's SERPs. I've observed countless independent SEOs - people who earned their living based on their SEO chops - quit that life because they could not longer make SEO work to their financial advantage. So, to gain a stable income, they transitioned selling SEO services to others. :-/
So . . you build a "network of sites". You interlink or don't interlink. You use the same IP address or VPS or your don't. You leave footprints and Google or competitors take note. You have servers in each country you are targeting or you don't. You score the exact match domains in all markets or you don't. Someone else uses your country+bus strategy but secures the country code domain instead of the .com. Players in other markets score local (in country) authoritative links and you don't. On and on it goes . . and you plan for your success . . while the lines of the playing field keep shifting as you attempt to move towards the goal line = a steady income.
Business and opportunity analysis can be simple and ruinous - "I'll win by being the better SEO link spammer!" Win! No, FAIL!) - OR relentlessly complex and convoluted - "What if this? What if that?", which is equally ruinous or self-defeating, as nothing ever gets done, nothing gets tested, nothing steadily advances. I'm an expert at the latter but, at least for some time, I've had the advantage of multiple income streams: law, domain parking, domain sales, website flips, etc.
keyplyr gave you a straight up answer. That's pretty good stuff. You didn't bargain for me to enter the fray but, after watching empires on independent webmasters rise and fall for nearly 20 years your question or your approach hit a nerve.
So, from my POV, what should you do? What should your strategy be?
Getting your head around Aaron Wall's "defensible traffic" is a step in the right direction. (SEOBook.com.)
Grasping Justin Sanger's thoughts about the "atomization of traffic" is another step.
Having a clear understanding and a profitable (time in, money out) social media strategy is a step in the right direction.
Buckwork's endless commenting about "building value" (for the user) is a step in the right direction.
Others might suggest that, while building a website, you might consider building an app that supports your mission. Why? Because decisions about traveling by bus can be purely economic or "made in the moment" or such decisionmaking may be usurped by Google's (and other) efforts to penetrate the travel market.
If you are stuck on SEO then it has to be asked: What insight have you gained from a "competitive analysis" of the SERPs in the markets you are considering entering? That discussion becomes problematic as WebmasterWorld has a policy about "outing other sites", so you can't be too specific. I'm just asking if you well know how to perform a competitive analysis (requires access to various paid and free tools) and an understanding of algos, ranking factors, an accurate understanding of the current state of SEO, . . .
Argh. Aren't you glad you asked? :-/
