:-)Currently neck deep in Bigger Pockets resources, real estate books and other resources to better understand the opportunity, marketplace and best practices of the industry.

Deep cleaning the carpets between tenants is recurring and appropriate to include if we're taking a 2 year average.

Actually Alaska may rank up there too but when you mentioned buying in lots you'll have to have deep pockets for that. 

As each opportunity crosses your path, you can choose to do a deep dive, get a lot of information, do a full analysis and then determine how you will move forward (i.e. invest or pass) .

They are common stories but there must be some exceptions out there if I can dive deep enough. 

I'll have to find out how deep he dug, but he told me that all they found was the buried house.

I own a few properties in the area just because I bought at a deep discount and they produce strong cashflows.

I have an opportunity to purchase 7 mobile homes in my area (deep east Texas).

In sunny CA you may only need the pylon to be deep enough to support any anticipated static loads.So rather than a contractor you may need an Engineer.

Flipping commercial property really requires a deep understanding of the market and the subject property's potential to avoid the pitfalls of having it sit on the market because you overshot your numbers, units going unrented, your budget falling short, etc.