The Rentastic (and other RE focused systems) do seem way more simple, and user friendly than QBO.

I would, as a couple, consider each of your unique learning styles, leadership styles, and investment risk tolerance.Perhaps, consider finding an investor friendly Realtor you both like and trust to help you come to consensus.It's a process.To Your Success!

I would advise finding an investor friendly realtor when you choose a market.

Low barrier to entry, low taxes, landlord friendly, some amazing class A and B suburbs and a strong urban core. 

The thing that got me considering this model and actually scaling it was a call I got from a friend.

Favorable Legal Framework for Foreign InvestorsGermany offers a straightforward and investor-friendly property market, with laws that protect the rights of both local and international investors.

On the topic of building inspectors, make them your best friend.

In my market, which is a fairly economical place to build, I am friends with full time builders that are in their properties about $150k/door for construction level finishes.  

BC and ON are very tenant friendly.

This is not yoursituation, but just to walk through the different thought processesin Holding/Selling that a friend of mine is going through.Helped my friend getinto the Self Storage business and walked him through the wholeprocess from evaluating the market, selecting a site, developing thesite, systems, financing, insurance, etc.