Cash: Passive investors can use their own cash to invest in real estate deals, including apartments. This can be done through a private syndication.
Self-Directed IRAs (SDIRA): are retirement accounts that allow investors to invest in a variety of alternative assets, including real estate. Investors can use their SDIRAs to invest in apartments or other real estate assets and may be able to take advantage of tax benefits associated with investing through an IRA.
There are several other ways to find investment funds you may have and not even be aware of.
For more information on passively investing in apartments, download my free e-book for more in-depth details. https://bit.ly/PassiveInvesting2023