which opportunity would you like to use?
Well, first of all if someone is buying entire building - then in my humble opinion this person is not so ordinary already (diclaimer: that is my personal opinion)
Second, there are plenty of options what you can do with the building, and that depends on what kind of building you are buying. So far we have residential, shopping (commercial), business (offices), and community buildings in respective districts.
So, if you are buying residential building - you may create certain design for its exterior and for interior and then sell or rent it to other users. Also, you will be able to put ad banners on facade of the building and get some revenue from that and so on.
The same applies to shopping building - you may sell or rent space in it to shops, you may ope yourown shops(s), you may put various ads on the building etc. Possibilities are endless
Regarding business building - you may sell/rent space there for all types of companies who would like to have 3d/VR representation. You may get additional profit from 3d/VR/AR cinference services
Last but not least: community buildings: you may open yourown gallery or invite existing artist to open his gallery. Also, you may like to invite existing museums to join and create their VR-museums. You may create all types of communities - such any type of activity fans community: like indie rock community, outdoor sports community, etc etc