The real estate investing industry uses "Classes" to rank property performance risk, but there's NO agreed upon industry model:(Here's what we use for our Metro Detroit market:Recommend you first figure out the property Class you want to invest in, THEN figure out the corresponding location to invest in.Property Class will typically dictate the Class of tenant you get, which greatly IMPACTS rental income stability and property maintenance/damage by tenants.If you apply Class A assumptions to a Class B or C purchase, your expectations won’t be met and it may be a financial disaster.If you buy/renovate a property in Class D area to Class A standards, what quality of tenant will you get?

Lastly, agreed 100% with Stuart, you can't go into it using best case scenario assumptions and allocations.

Your assumption that gained equity defines a performing property is wrong. 

@Thomas FarrellRecommend you first figure out the property Class you want to invest in, THEN figure out the corresponding location to invest in.Property Class will typically dictate the Class of tenant you get, which greatly IMPACTS rental income stability and property maintenance/damage by tenants.If you apply Class A assumptions to a Class B or C purchase, your expectations won’t be met and it may be a financial disaster.If you buy/renovate a property in Class D area to Class A standards, what quality of tenant will you get?

Your assumption makes sense to me as what was trying to be conveyed. 

I am wondering if you are making some assumptions that just aren't true. 

Your assumption about them being understaffed or prioritizing larger clients could very well be true.

Answer sure.. have to check if there is a due on sale clause or if you have a PG to the orignal seller.. that mortgage stays in your name unless there is a formal assumption  Maybe the example is more challenging for a house as the property.Ex. with vacant land - seller finances to me $20k with 5% down and $1k/moCan I after 1-2 months, then resell the land to a cash buyer for $25k, pay off the original $20k and pocket the $5k?

Borrowing costs are nearing their highest point in decades and the municipal and state debt crises do not get nearly the attention of the federal government or deserve.Environmental Impacts : My assumption is that the entire toxic debris removal process will have to be managed by the Army Corp of Engineers X FEMA and other governmental agencies.

No if potential buyer have given you emd than you are under the assumption this is a serious buyer and will close on the deal but he has only a certain amount of time with his inspection period so if he backs out you still have time to fund another buyer.