This appears to be what happened to your relative. 

Figure out how to fund it (a whole different discussion), and include your relatives on the next one as a partner, if you insist.

., for your relatives or a partner's), then a 2F might be a good choice because you can rent it now but potentially convert it to personal use later.Since you're only 20 and may not be thinking about taking care of your or a partner's relatives at this point, I lean slightly toward a 3F being a better option for you, but it's really a personal decision and if you find a good 2F close to you (or in an area you really like) then I'd say go for it.

You're going to need to make up for your relative lack of capital with an increased amount of hustle.

If you use your relators association lease read it and revise applicable section (no big revisions-just make sure it includes relevant info).

@Louis W.Allegedly, your brother is living in your rental and refusing to pay you rent, while he and your sister are attempting to extort you after the death of your father...and you're worried you'll look bad in front of your relatives if you evict your brother?

You can't directly or indirectly benefit from the funds - so you can't mix your IRA funds with your regular money, you can't pay yourself out of your IRA, you can't pay your relatives, and so on.

The only information you've provided is that you would apparently buy it cheap and then rent it out to your relatives.

Which means they would buy your relative’s home either cash or on terms but either way that relative would have to vacate the property.

Or your relatives.