Welcome to BP @Neil Patel What you are asking about is how to evaluate a deal.

They'll have to evaluate the intent behind the zoning and why you should keep it.

Most important thing is to be able to prove to the government that you evaluate all perspective tenants in the same manner.For instance, you can't post you accept dogs or bad credit is no problem and then turn around and tell a section 8 applicant that they are not getting the unit because they have a dog or bad credit. 

Do what you can to evaluate the property...trust but verify the seller information.

If you need to borrow more than 80% of ARV for a short term loan on a rehab then you need to re-evaluate the numbers in your analysis. 

My thought is if I can afford to pay the mortgage without any tenants in the property how do I evaluate if it is a good purchase?  

Investment decisions require a market risk evaluation as to the probability of future market conditions, real estate, being a non-liquid investment carries less volatility compared to interest rates or stock options or options on commodities.10.

I'm still learning about how to evaluate investments.

Not learning how to evaluate a deal.

I believe it is time to move onto the next property to evaluate.