A property could be cheap but be located in a low performing market.

Most banks I work with require anyone with over 20% ownership to guarantee the debt but have seen as low as 10%.

That protects you from having to sell to  low.

When I worked as an MHP broker, if the park was on a lagoon, I could never find a buyer no matter how low the price got. 

If I ever run low on reserves, I can easily transfer funds from my personal to rental account.

here in Pittsburgh for example, you can buy properties in OK neighborhoods for $50-60K that need $80-100K rehabs. 

I have seen some properties on MLS that I contact my realtor and they may know right away the reason it isn't selling from showing it previously, or they can review the realtor comments that aren't viewable by the public on MLS.Other potential reasons I have seen properties listed on MLS for a long time. 1) Some investors may not be comfortable inheriting existing tenants.2) It may be it is a class C neighborhood. 3) Structural issues.

I love that these homes are in class A neighborhoods, I have seen this strategy work out for investors before but they were at least cashflow neutral. 

Property TypeUnderstand the different types of multifamily properties:High-Rise: 9+ floors with an elevator, often urban.Mid-Rise: Smaller than high-rise, usually with elevators.Garden-Style: Low-rise apartments in suburban or rural settings.Walk-Up: 4–6 stories without elevators.Manufactured Housing Communities: Mobile home parks where land is leased to homeowners.Special-Purpose Housing:Student Housing: Designed for college students.Senior Housing: Dedicated to older adults.Subsidized Housing: Affordable housing supported by rent and income restrictions.3.

A personal liability policy "MAY" extend to one or two rentals but if you are planning on building a portfolio consider the commercial umbrella.Another thing to consider is that the courts frown on carry high personal liability but low business liability when trying to hide behind the vail.