It was not uncommon for him to double his money every month.

In Milwaukee, it is not uncommon for the assessed value of a property to be WAY off from what it would sell for, or is actually worth.

Again, not uncommon in most any industry.

It is not uncommon to feel overwhelmed when engaging in any new project or endeavor.

I would say it is uncommon for them to try and make money off a foreclosure.

If you are buying the property from another investor (older, tired landlords are often good candidates), then there may be a significant capital gain coming to the Vendor which can be more motivation for a vendor carry.In the commercial world, a vendor carry as a second mortgage of a portion of the sales price (typically 10 - 25%) in combination with conventional financing is not uncommon for a vendor trying to sell into a tough market or divest of a property at a specific price.The key in recruiting your Vendor into a Vendor Carry is to solve a problem for them and put their interests first.

There is nothing illegal about that; it is not uncommon for cash buyers to do something of the sort in order to protect their investment.

Here are all the things I have found so far that I am thinking of including: Inspection ContingencyFinancing ContingencyTermite Letter ContingencyLead Paint Test ContingencyDeed Contingency (stipulates what type of deed is expected from the seller at closing)Radon Testing ContingencyMold Inspection ContingencySewer Inspection ContingencyInsuranceIf any of these are outdated or uncommon and I should take out, please let me know! 

It is not uncommon in this business that making 50 offers will be required for every successfully accepted offer. 5 is very few offers.

And as far as you seeking a smaller deal so you can own it outright that's not uncommon but you could always think to invest passively in a deal or a few and depending how much you have invested and the yield you are achieving in those deals, you can live off that passive income and not have to worry about the apartment building while out of the country because that's what the guys in the general partnership will take care of.