It's the opposite. You need to get RO tax residency so that other EU countries won't have questions for you. You don't need to pay anything that you mentioned above since you are going to get money through dividends (5% tax paid by company ).
So after initial setup, you only pay: rent (300e+), accounting( mine is 45e/month), 3% revenue tax and 5% dividend tax. If you invest personally or through the company then there is also 10% Capital gains tax. After all that it's still a bargain if you compare RO to other EU countries. Best part is that there is no 6 months bulls**t residence requirement.
The only reason to pay salary/social/health insurance is to hire yourself for a minimum wage. If you have an employee(you), your revenue tax drops from 3 to 1%
I actually decided to stay in my country while keeping Romanian one. So I'll pay 3% revenue to RO, then around 17% to my own country as corporate tax. But after 5-10 years I will retire, move to Romania, take all the money out and move again somewhere warm and nice. So basically it will be 20% corporate, 10% Capital gains and 5% dividend at the end. Which is way better than just using LLC in my country ( 20% corporate, 20-30 dividend, 30-35 capita gains ).
How does it work exactly? Did you report it to your home tax authorities? Or did they find out? How do they decide what part of the profit is taxable where?