You apply your $100k worth of inheritance toward the price and just buy the house for $400k paying $100k to each of the other 4 beneficiaries (overly simplified math obviously, but you get the idea).There could be important legal aspects to any particular trust that I'm not accounting for as well obviously, so I would still suggest consulting a real estate/trust attorney at minimum. 

Technology has revolutionized the real estate industry, providing invaluable tools to simplify and automate various processes.

If the software is not simplifying your life or making you more accurate, you shouldn't use it.Software does have extremely helpful features like online payments, marketing syndication (click a button and your property is advertised on multiple sites), electronic document review/signing, maintenance tracking, and owner reports.

But then again, you've over simplified.

We utilize a form that has a room by room checklist with all primary elements (walls, floor, ceiling, windows and screens, light fixtures, tub, toilet, towel bars medicine cabinet/mirror, ac WITH remote, etc); a "move in" column and a "move out" column with room for basic notations for each element, which simplifies the documentation and decision making; and Tenants sign at move in walk through inspection, and, if present, also at move out inspection.Check local LL/Tenant laws, but unless you have provided a "standard" list of potential move out charges as part of your initial Rental Agreement, most Courts will require a third party invoice or estimate for deductions from SD.

I've simplified what actually happened but the affect was the same;  i.e. the pool of potential buyers increased because of owner financing.  

This is an over simplified new build scenario.

All simplified through Apps downloaded onto whatever smart device one utilizes.The BPO's legitimacy is in the fact that a licensed appraiser personally visits the requested property which the user has to compensate the individual for his time.

I personally use Podio, and to simplify the process, I hired someone from Fiverr to set up the apps and integrate them with the various platforms I use.

Not to simplify your concerns, but cash flow is cash flow...it's all based on risk tolerance and need for income through your investment.