Bonus Tip: If this quadruplex is out of state, I’d highly recommend building a reliable local team (cleaners, handymen, etc.) and maybe consider hiring a co-host or VA to help with day-to-day tasks, especially if you scale up. 

Here's a video with some tips, but I recommend you watch several videos, read some blogs, and educate yourself on what to look for in a brokerage:

Its a cheap and easy way to get some education and experience that will serve you well.

After two years your only profit will be the education you gained. 

They can ensure everything is safe and, if you attend the inspection, they can educate you on what to watch for.

If I invested 100K today, they are currently providing anywhere from 60 to 72% passive tax deductions due to cost segregation, depreciation, etc. 

Educate and then execute.

The intent of getting a sales agent license is to educate myself in Real Estate and create some additional income.If your relationship is such that you need to hide your license, you’d be better off with a different working relationship.  

Just today I got a booking request at 3:30am here in WA state.

If you're a landlord, then you'll want to educate yourself on the local laws.