how to find location type and crime and present and future value

[Gp G.]

how to find location type whether it is A, B or C or D.

Which type is better to invest i heard like C or B.

How to find for a particular small multi family unit in a particular city  below things

crime rate 

 present value

future value of a property 

job growth 

gentrification 

development that is there 

employer details 

future development that is coming 

neighborhood details

how much i can pay for each unit

how old buildings i can consider to purchase

what types of buildings are out there which last longer..i heard brick lasts longer?

what types of roof there which lasts longer i heard flat roof last longer and easy and cheap to replace

Please advise