First step is to determine what you're allowed based on current zoning and see what if my will take to get a variance if required.

I'm pretty sure Ohio implemented a law allowing auctioneers to help liquidate the high number of foreclosures Ohio (3rd highest in the nation I believe).  

A non owner is not allowed to collect rent money without being a licensed property manager or real estate broker.

I believe the tools available will allow me to be succesfull in real estate.

Hi , I am buying a one family home, and would like to rebuild it from scratch, home is around 700k , rebuilding might cost 400k , I have enough 20% down payment and my dti ratios allows me at 800k conventional,Whats the best should I should do for this home?

Not needed if buying for what is owed plus arrears.I've been a landlord for a while and I don't allow smokers or growers of any kind no matter the higher rent.

You will need a place to put it, and if you don't already have land that will allow it you need to find a Mobile Home Park.  

Usually no more than the allowed 43-45% back end ratio.

Most states do not allow you to play both parts with the same client. 

Some REO properties will not allow you to sell (make money) for a certain time frame.