What: 1) 3 story, appx 2200 sqft apartment building built in late 1880's, all boarded up needing a major gut rehab (# of bed/bath are unknown) 2) lot right next to the above building (don't have the measure yet but it's small, appx. 0.2 acre or possible under )Purchase Prices, ARVs, and asking prices (provided by the potential partner): Potential partner got both of them as is off of a private auction at below prices: 1) building: auction purchase 700k; ARV of 1.3M; asking to sell at 900k 2) lot : auction purchase 300k; ARV of up to 1M; asking to sell at 300k Proposed Partnership: She is funding 90% of the deal through her private lender so she needs to put down $100k of her own cash and she is asking me to put down $50k with profit split of 25:75.

If you have the address, name of the owner or parcel number, you can pull up the tax record.You can also click on the GIS map from the County page, if available, and check the property acreage, measure the lot, check flood zones, zoning, and more. 

1) Ignorance of the law2) Ignorance of costs3) Inability to understand and properly measure the risk involved with an investment.

I am wondering at what time period the COC is measured and if the initial COC is below 10% but grows to 15% or 20% or more within 3-5 years is that an acceptable return for a buy and hold investor?

@Angelo Van I am a big fan of the 1% rule; it is my first measure after the neighborhood.

So actually not that different when measured against income. 

It's very hard to measure lost opportunity cost.  

One measurement that most of the management companies are bragging about is their low vacancy rate.

@Christopher Bluem my residential properties are in central PA, near Harrisburg (where the eviction is taking place) so not as stringent as Philadelphia but this is helpful.

But by the time we were discharged, we were financially depleted, having resorted to desperate measures to pay our attorney for the bankruptcy.