But on the commodities trading part, based on technical analysis, we are quite close to the bottom of crude price, maybe one more spike down to complete the whole downturn (maybe ~$22 to 23 range).

Financing was my achilles heel and I eventually had to drop the deal.I've dealt with several HMLs on smaller rehabs, but none of them were comfortable lending on such a large commercial space - most are used to SFR flips with a 3-6 month turn rate.  

The cost of materials has spiked, and availability of materials has declined.

@Razi Salman Well, you could put that 100k down on a commercial multifamily and capitalize on the spike in demand for rentals. 

But, that's going to be incorrect as the 2016 population already reached 8.55 Million.Anyway, the point is that it isn't surprising to me that Class A properties had a spike in Vacancy compared to the other Class properties, mainly because the supply of Class A properties were being completed all at once.You'll probably see a leveling out of the plot line within a few years as the number of Class A projects level out again.Of course this is just my opinion!

As communities change, demographics shift, new industries emerge or existing industries see growth the demand for housing spikes. 

Electric can also spike in the summer with A/C.

Before Hurricane Harvey rolled through here creating extreme demand for contractors, (thus spiking prices,) an experienced architect and family friend told me I could get a good quality full sized 3/2 built for about $150/sq ft here in Houston.

had spiked 2,500% in the past month.

If you guys don't mind, I'd like to share my own thoughts on this topic ;) This last spike of this discussion was inspired by a post from Paul F who attended a 3-day workshop and was very dissatisfied.