As both an investor and a mortgage broker who has personally used both options, I can say there are benefits to each.It ultimately comes down to comparing the two side by side based on your specific situation.

As with many here, I've been using a mix of Cozy (now Apartments.com), Stessa, and a few other custom workflows for turnovers that have worked well in the past, but with the takeover of Cozy by Apartments.com I'm now out shopping for better options for my primary, tenant-facing service. 

In addition to conventional loans and FHA loans, if either you or your wife are veterans, the VA also has a rehab program.I'd be happy to discuss my rehab experience both as an investor and as a mortgage broker, and at least help you think through your options. 

Secondly, calendar and email functions/apps on computers and smartphones provide great records and a log.

You have received some great recommendations and if you are yet to decide on an Investor friendly to work with, you can send me a DM and see if we are a good fit.I do provide free mentorship and a lot of free resources and connections to anyone I work with especially beginners like you. 

I have several vehicles and lots of stuff in general and a wife that would not be ok with a duplex.  

And a few from 0% interest for a year credit card loans too.

They got me the loan in two and a half weeks.

At the beginning, I had to use my own money and credit lines and a HELOC.  

And a .81 in Nampa, ID.