Not necessarily much help aside from unlocking doors in distant lands...Or, you will find an experienced investor agent who will be a wealth of knowledge and wise advice but isn't going to jump through hoops for no money (or even the "promise" of money later on) simply because he doesn't have to.Although I'm sure they do exist somewhere, it'll be very difficult to find an agent who will be all of the above.You will be better off in the long run associating yourself with multiple agents and using each one for their individual strengths based on each specific deal and location.

I have made the mistake in the beginning of discounting a commission (or taking a low priced listing) and the seller wanted me at every showing to unlock it, and I had to move the dog out, they would wait till 3 hours before a showing to confirm etc.

After reviewing the new Tiers for SD it seems to be that there is an opportunity unlocked for owners/investors targeting Tier 2 licenses. 1.

Last week he turned in the key because he just leaves the door unlocked as he comes and goes.Is that grounds enough to just lock him out or do I have to proceed with court?

I was always looking for fixers in bad parts of town, and often there was a window or door left unlocked so you could just 'let yourself in'.

The only way someone is getting into one of my property when a guest is there is by forced entry or if the guest leaves the door unlocked.

The landlord property code you are referencing seems to be more targeted to the ability to lock the door from the inside without the ability to unlock from outside.

It's a math game, using the properties to secure more properties unlocks expanded equitable gains but also creates more security of performance via volume scaling for items such as maintenance and vacancy rate because now if/when there is any of those costs is averaged out among 50+ properties vs 5, making for a much MUCH smaller % hit, there in best retaining cash-flow security. 

Quote from @Justin Youngblood: It could be she doesn't even have the key and was leaving the door unlocked, meaning you locked her out.I wouldn't move her belongings unless you have a written agreement with her.

An unlocked workbook may simplify your data entry and allow you to be more accurate for each property you are analyzing.