Yes, there will be better investment properties, and glad you are on the track to other ones.

If you can find someone you can trust who is getting started and needs the money and you both are educated/savy you could develop a partnership with a good equity stake.I believe @Joseph Pytcher builds spec homes, has a track record and is looking for capital.

In return, as an attorney, I will handle all rental agreements and legal matters, showing property to potential tenants, and keeping track of monthly rents, handling maintenance issues and all other matters that fall into the handling of commercial real estate.

Track all you do and review it regularly and see where you might cut your expenses gain your income.Always do your math analysis and try to look at your prospective properties before you make an offer or at least put a clause in the sales contract (for about 10 to15 days) without a penalty that will hurt you too much.  

Though, they will need to know your experience and may want to see a track record.

As to the accounting system, it does fine for me so far, I don't have too many units and it's accounts are customizable, figured that need a more focus account software probably from an accountant anyway this system just to keep track the trial balance.

Would the most recent deed be the person I'd need to try to track down in order to ask if they'd be interested in selling or would it be based on one of the assignments?

Your steps so far and your goals seem to be right on track.  

Am I wasting my time by trying to track down the homeowners and making them an offer?

BTW, I think you're 100% on the right track by analyzing them for when you're renting out all units and not living there, since that is the long-term goal.