My advice when looking at a house hack is to not get too in the weeds on how the property or building performs compared to other properties in the area, but rather view it from the lens of what it will do your personal finances and the impact it will have on your personal cost of living.  

There are specific requirements for the solo401k.You must be a business owner with no common law employees and earned income to supplement the 401k plan.

Find a deal, flip the contract, earn a fee.

Feel like I am waiting for the next shoe to drop with this person.

I have also sent personal hand written letters to people who are listed on the tax records of properties that are vacant.

No matter how great a 1-person manager is, even with staff, you’re one personal issue away from major problems.

How do you all personally track your properties?

I am a broker but would prefer to pay a person rather than a corporation on my personal investing. 

My database suggests roughly 2 X SDE (Seller's Discretionary Earnings). 

Personal Cash from previous flips How did you add value to the deal?