I think you have to search out your own resources, skill set and inclinations. This may include your ability to delegate the many aspects of maintenance and management or your willingness and ability to do it yourself.
If you are prone to condos and apartments investigate what it takes to operate and see if that works for you.
I like SFR’s duplex or triplex,or at least the idea of them, as opposed to condos, because as a contractor I can add on or otherwise improve the value or the asset and rent capability. They are also within my financial means (sometimes).
I also have no interest in being in a situation where I am almost forced take tenants at random, as with apartments. I don’t delegate well or want to be an apartment manager so that is another strike against larger muliti-family. If these things are o.k. with you, density might be an advantage. Maybe they are more rent-able, but I always aim to have the ability to rent under market and be selective about tenants.
Right now I just have my house and I am building a two bedroom rental. After that I will probably/hopefully buy detached houses.
