These guys do and they also own the operations of their business too and continue to grow it. 

My dad is a self-employed owner of a plumbing company that has been around for 12 years, he is a 50% owner with his partner being the other, and they are an LLC that is registered as an S-Corp.I have been working with a lender for the past 2 months, and between a lot of back and forths, we were finally able to figure out how to work in enough deductions back into his income in order to get his income underneath the required 50% DTI in order to qualify.

I'm currently working full-time in the military (National Guard) as an Operations Officer and loving it.

@Jonathan Bell This group has many well established, experienced multifamily investors and operators.

They had a home based business and its kind of iffy when it's operating in a residential zone.

I don't know the deal and suspect you are trying some Airbnb or resort operation but if you look at what actual resorts sell for and how much more value you get in buying a resort, you will see why this sounds like a stretch paying full retail for 4 different condo units.  

Honestly, I'd just go directly to the lawyer and they'll be able to take it from there.For us, we filed a multi-member LLC with the state first, then went to a lawyer to structure an Operating Agreement.

The details might vary, but this is how most private money lenders operate. 

Finding a property management company that you can trust with your investment can be a weight off of your shoulders and provide "mailbox" money to you without you having to lift a finger (except for when you have to grab that money from the mailbox).The cost of property management services varies, but any great trustworthy property management company can outweigh the cost substantially by providing you with time-saving services that handle the day-to-day operations of owning a rental investment property.

Landlords mistakenly ASSUME all PMCs offer the exact same services and operate the exact same way, so price is the only differentiator.So, the first question they usually ask a PMC is about fees - instead of asking about services.This also leads them to ASSUME simpler is better when it comes to management contracts.