I'm looking for methods to improve an area / entire street to create a higher end pocket (particularly in C- / D+ areas). 

HouseHacking, a fourplex I've heard would be a good method.

What method do you use to calculate your replacement insurance valuations for your properties? 

Even if you don't go to a 4 year university a trade school may be a good option.

What methods do you all have?

Let me know if you agree or disagree with my method any feed back is appreciated.here the sample report:

The typical equation is going to be: Taxes = Assessed Value x Mil Rate x A Certain Percent In my market, the counties use an easier method, it is 1.7%-2% of the total assessed value of the property and they recalculate at a sale, or during the next year cycle.

Still, if you buy right and the numbers make sense, I don't think it will affect hard money as much as other methods of lending.

Any other hints and tricks of the trade would be greatly appreciated.2.

@Nick Robinson Awesome quick analysis method.