Same in Lithuania, not a problem, if price for renting is like market price, else, it would be interesting to local authorities.
Rent on self-owned is definitely higher than market price. It has to be for the transaction to make sense.
Company rents office from other company, you can have as many companies as you want.
You generally couldn’t, for example, transfer significant wealth to a friend without high taxes by selling them something for a dollar When it’s market value is $10 million. This issue here is completely different.