Re: Better fit!
This will be your biggest challenge, especially when you have no experience in tailoring.
A friend of mine is a tailor and he was trying to help a guy with a basic pattern. That guy had no clue, didn't know the basics of construction, yet was very picky about the looks/ styling. He went through several tailors in his home country, tried several different MTM companies and still has no business up and running.
Also, from what I know or have seen, catering for the Asian market using Western/ Caucasian patterns/ sizes is most likely to fail, as the figure types are vastly different. By that I mean you'd need someone (a tailor or a clothing company) to create a line of garments to match the physical requirements of your target group. That is likely to be a time (and money) consuming process.
Some MTM suppliers offer 1 or 2 day courses for vendors to give those a rough idea what to do, but it takes time and a lot of experience to figure out what alteration is best. There is also the problem of those alterations having side effects in the sense that changing/ enhancing one aspect can worsen another.
Also, be aware that there will be alterations necessary at some point, even if it's only shortening sleeves or finishing the trouser bottoms. So you'll need a good and reliably alteration tailor.
That said, many MTM companies in Germany just use charming (mostly female) staff to assure that the suits are leaving the shop with as little alterations or complaints as possible. So you might want to put money aside for a hot assistant. Maybe
LKP
can help out with his contacts regarding Russian escorts (or their bosses).