I think the better business to manage from abroad being a 100% online business, not any physical business. Apart of the big matter to find a trustful and honest manager (not that easy), there are taxes implications: these latter, only a well established entrepreneur can afford, as there is the need of an accountant each country and there are tax obligations and a heavy bureaucracy: an accountant in the country where you are physically resident and the country where the physical business is established. You need various annual tax return to fill up (better said, the accountants have to fill them). And you need at least a bank currency account per country and a trustful and honest person to manage the currency account in the bank of the country you are not physically resident to pay the taxes for you in that country, as it could be impossible to pay taxes from a foreign bank account. At least, that's happens in most countries I know. In my former country, the tax agency bureau doesn't accept payments from a non-UE bank, even less from an online processor.
In any way, I wish the best for your school, hoping for less bureaucracy in your country.