I have written a personal letter to the owner once every six months over the last several years, asking if he wants to sell. 

I still get phone calls and letters regularly for properties I sold more than a decade ago.I always offer to sell them again, but am straight-forward that I no longer own the property.

(I do not know if she has a legit letter or not) Regardless, I understand FHA I can't deny her application based soley on the ESA, but if the one of the current tenant have allergy issue, can I deny then?

If they deny the rent, they will send you a letter asking if you will accept or deny the reduced amount.

They already sent Default Letter!

I wouldn't likely/necessarily be mailing a lot of letters for example.But mainly, I would pay for a service that offered me the closest thing to an instant/on demand "preliminary title report" , that is something that greatly "simplified" initial research, preliminary only of course- based on apn.

Based on your experience as a lender, what is my likelihood of having a "letter of intent to employ" accepted by an institution? 

I can see this being fruitful and less expensive than trying to mail out letters.

The employment GAP isn't always an issue as long as you're now a W2 employee, can show 30 days of pay stubs (not self employed), and you can provide a letter of explanation stating the cause of the employment gap.For a VA loan, in order to use the rental income from the other units you'll need:1.

The profitability of the investment may also be increased by arranging for a balloon payment, extending the repayment time, or negotiating a reduced interest rate.Thirdly, consider the advantages of purchasing the property using seller financing in the long run.