Now sometimes I would get a credit for a new lead but you have to write a detailed explanation every time I would ask for refund and wouldn't always get it rewarded. 

@Trevor Finn Nailed this explanation!

And second because it's liquid.If you invest to MF with 500K and they ask you for capital call without the explanation why they have to do it ?

Quote from @Rud Sev: Hi Michael,Thank you, I will message my CPA asking for a more detailed explanation.I've been inquisitive with my CPA, but unless I ask question I do not get explanation (and unfortunately not a walk-through), although I've shown interest understanding this further and further.I'll try to reformulate my question more clearer (and with more data) - the problem that I have and will have is figuring out if my questions and confusion are due to a lack of understanding on my part, or my CPA is truly making mistakes.Regarding carry back, thank you for this info.

Once you read the explanation below, you will understand how REALLY bad things can be if you don't get the letters but go through with the purchase.First, the owner/seller should have a clause in the lease requiring tenants to sign (or object to in writing) tenant estoppel letters if presented to them.

These all require applicants to submit an acceptable Letter of Explanation addressing each specific issue and occurrence.Rental HistoryBecause a current landlord may say anything to get rid of a bad tenant out of desperation, we also require information for the previous landlord of all applicants.

.• Geographical Competence: Is the appraiser familiar with the area?

Quote from @Michael Plaks: Quote from @Scott Trench:  Super helpful explanation!

What is the amount you are expecting to start with and the geographic target area.

After reading through nyc.govs lengthy explanation on M1 zoning laws, I am still trying to figure out if we can do this or not.