Cold called this property owner who wants $150K for this 2 bedroom, 1 bathroom 928 square foot home. 

This is what causes people to not call ever and to have friends fix stuff the wrong way.If they want something checked out and then it turns out to be fine, maybe then a service call would be warranted, but not every time especially when they are service issues that are on you.$250 a call for someone is insane.

I work with many professionals who, like you, have a demanding full-time job but still manage to dive into real estate investing.

I'm happy to help walk you through the process if you want. 

Purchase price: $55,000 Cash invested: $110,000 Sale price: $205,000 This was a 1950 raised home that needed extensive foundation repairs as well as all plumbing, electrical and subflooring.

Only do this if you'll be staying in the house for a long time.

Purchase price: $150,000 Moved mobile home on bare land What made you interested in investing in this type of deal?

In your case, the agent also wants to lock you into a future sale, but that doesn't incentivize her to place a good tenant.

This is more common that you might think.They do not take into consideration the costs borne by the investor associated with the transaction such as: closing costs, carrying costs, finance costs, exit costs, etc.They are trying to hit a homerun on every deal and not leaving enough "meat on the bone" for the next person. 

@Vito DiIennaWhile I have not had to get a Letter of No Objection myself, if I had to do it, I would go right the the DOB, go into the Office that you can get an official Cert of Occupancy and ask them what is the procedure to get the letter.Normally, you will need to provide evidence.