Get an inspection by the most reputable provider you can find.

I am currently exploring strategies mixing buy and holds and fix and flips using traditional and creative financing and in the meantime pursuing my CA Salesperson License - all while raising toddler twins!

I also across another suggestion on BP which is worth exploring  paynearme.com

Now, if you are doing this because you will be on a temporary work assignment out of town and want some income to help pay the mortgage while you are away, best to use a reputable property management company.

As you and Paul have both said I will need to further explore the variety of niches.  

Take your time and explore options using other people's money that will cost you less than using your own retirement money. 

I am now exploring the idea of opening a bakery snack retail store. 

5 unit is a commercial loan so you need to explore that aspect of the costs as well. 

Find the nearest Real Estate Investors Association (REIA) and network to find out some reputable contractors who do rehabs for investors.  

Use the keyword tool as well as explore the learn section that is available, there is a wealth of information in the archieves.