Discussion on teaching Business English
Run, don't walk, to the nearest bookstore and buy Market Leader. Get both the textbook and the workbook. Have your students do the same. It's not perfect, but it is good. Also, look at Linguahouse, which has a lot of both free and for-pay lesson plans in business English, but I don't think they have a full curriculum.
EASTERN or CENTRAl Europe? Just asking
Honestly this question comes up a lot and I have good news for you. You can use Off2Class to access business related lessons for free. Also if you need student comprehensions levels you can track those. However, this material could be useful for future planning. This is the lesson that requires no account and if you do make an account to access more Business English Lessons, no payment is required which I think is great!
It isn't easy to start something from scratch.
First, do a needs analysis. Then give a level test that is relevant to your learner's needs. For example, if your student has trouble keeping up in meetings, a strong speaking and listening element should form part of the test, and subsequently, your curriculum. Luckily, various needs analyses and level tests for business English are available online, OneStop English, for example. Don't go ordering books before these stages or you might end up trying to match the learner to the material rather than the material to the learner!
It isn't easy to start something from scratch. It seems that it makes sense for you to take some courses to understand the topic better. For example, I was recently offered a new position at work, but I had to understand financial modelling. Unfortunately, I didn't understand this, so I decided it would be nice to take some courses. I started looking and came across some online courses at wallstreetoasis.com/resources/why-wso/wsp. I bought the training, and I really started to understand this topic well. So to get better at something, you need to study a lot.