I think that is absolutely right path for the big owners like you.

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.

I'm a small business owner and my partner has a corporate job. 

You can buy a solid duplex with $1800 rents and no owner expenses for $350-$4325,000 that will appreciate and build wealth and cashflow.

This also allows for property owners to more easily write-off assets that get damaged/destroyed as the value of these assets is determined as part of the study.

I've sent letters to the owner on tax roll.

Even if they don't fix it you would need to hope a magistrate decides its severe enough to evict.

If you decide to go the multifamily route, Real Estate lab .com is a multifamily software for deal analysis plus they have many other useful features. 

There is risk in both options & as an investor you need to weigh those risks & stand firm on whatever you decide. 

You're likely looking at a 25% down loan for a non-owner occupied.