They will also contact you if any repairs exceed $200 (I'm sure the threshold is negotiable), but will otherwise just take care of it (with their team, or your own if you have folks you prefer to use).I don't know what their contract actually states though so I'd want to look at that more closely.  

I'd prefer to use established tools for analysis rather than starting from scratch.

I also prefer not to use a management company, as I don't want them cutting into my profits.My long-term goal is to generate enough income to live comfortably and eventually build a real estate empire.

@James KhailSounds like you've boiled down your options to:a) in state property with tenant-friendly regulation, self-managing in a low-income neighborhood with possibly higher turnoverb) out of state property with less landlord regulation, professionally managed, in a nicer areaIt comes down to personal preference and your time value 

I prefer my method because with the $800/month estimate you might buy a property believing its a great deal, BUT sell it after several years having made negative cash-flow.

Plus, many build-to-rent options come with property management baked in, which can be a huge benefit if you prefer a hands-off approach.On the flip side, BTR properties can sometimes come with a higher upfront cost or a longer timeline to start generating cash flow, especially if construction is still in progress.

Owner just needs 45 days to move out, is motivated to become a tenant if buyer prefers to not renovate until next year. 2nd floor tenants are on a month to month lease for $550.

Does anyone else prefer good old buy-and-hold long-term rentals?

When I'm interviewing agents the first few questions are what title and escrow do you prefer. 

I would nonetheless be the contact person and primary decision maker with property management and my brother would be largely silent as per his preference.