Someone correct me if I am wrong in this as I have yet to purchase a property lien in this manner, but have listened to several people explain the process recently.

risk vs. reward:  the investor has put the capital at risk, while the others have no risk in the venture.There are MANY permutations for this, but do you see the basic issue at hand that you three need to understand and address, in whatever manner satisfies the group? 

Lastly, be a good landlord and build a certain relationship with your tenants by ensuring that you address all issues and concerns in a timely manner.

I tried doing a lot of the repairs in a DIY manner, but I ended up wasting way too much time and money.

The ones with a crate for the dogs have been well mannered and left it smelling better than when they came.

Leverage changes that equation, but if you are changing it in a controlled and realistic manner then being afraid of the debt will just impede your ability to grow.

@Jason Pharr - have you found anything compelling?

Some of the other factors that an underwriter may look at in determining if you're making an "improvement" to your living situation are whether this next property is:- in a more desireable location generally, - in a more desirable location for you specifically,  - in a better school district- newer or older- featuring better amenities and other conveniencesIf you can show some other overriding justification (such as a job transfer or something else compelling) they may take that into account as well. 

It’s unfortunate the neighbor came at you in such a hostile manner. 

Your confusing statements specific to the housing market with the entirety of the national economic market which recedes every 7 years or so, or with the stock market which crashes in some manner every 10 years or so.