update: some renters prefer simpler life in a condo.

I now feel condo is very popular for renters, with

• relatively new facilities
• location — high rise buildings are worth building only at prime locations, often near transportation and shopping.

However, investors are often better off with SFH or 2FH because

1. can subdivide into tiny rooms
2. can live on one floor and rent out another floor
3. can expand to add a room
4. land appreciates
5. no HOA to erode the rental yield