For speeds of 1Gbps (Gigabit Ethernet) or slower there is absolutely no point using Fibre-Optic connections, the cost would be unjustifiable. If your apartment is so large that the distance the cable needs to run is more than 100 metres then the network should be designed so each floor is linked by Fibre-Optic cables, but within a floor you would need to have an apartment more than 100 metres wide or deep to exceed the limit.
I have found some Thunderbolt adapters which do use Fibre-Optic have for their purpose are justifiable. However I still think for even the richest apartment owner there is still no reason why they should be needed.
First a 10Gbps (10 Gigabit Ethernet) adapter, this is therefore ten times as fast as the built-in Ethernet port.
See https://www.attotech.com/products/product.php?scat=32&sku=TLNS-1101-D00
You should note it might actually cost more than a Mac mini!
Secondly an FDDI San adapter again using Fibre-Optic.
See http://www.promise.com/promotion_page/promotion_page.aspx?region=en-global&rsn=1 03
or https://www.attotech.com/products/product.php?cat=16&scat=29&prod=100&sku=TLFC-1 082-D00
These are not network adapters and will therefore not let you access the Internet etc. they are specialised adapters for connecting to a storage area network and hence to a shared storage system.
It should be noted that even for speeds of 10Gbps you can still use copper wires.
See https://www.attotech.com/products/product.php?scat=32&prod=103&sku=TLNT-1102-D00
