With that said, I hand wrote all 70 + letters myself, addressed each envelope, stamped and stuffed each one. 

My first 100 letters (doing them in waves as that is what my capacity can handle) I did through Printing letters via Word and stuffing envelopes. 

@Raul Ocampo I have never had a formal mentor, so I cannot answer based on experience although I imagine like any deal, contractor, or product: there are good ones and bad ones.Another alternative is if you can find someone on BP that's doing what you want to do in your area then speak to them and offer them your expertise (marketing, accounting, sales, construction, even envelope stuffing) in exchange for them mentoring.

For instance "$80.00 to remove shredded chair stuffing from lawn." but I would also have a photo of the mess and an invoice for the cleaners. #20 of that would be for my time to arrange the cleaners etc.

I recently spent some time with my mentor stuffing marketing letters into envelopes and the way he does it is very clever.

Maybe I can help with some of your questions.For your yellow letters I would say that your second idea of stuffing a business card in with your letter would be a better choice than putting a picture on the letter.

The rental we own is in Farmers Branch, and the rental registration paperwork is just something I've just stuffed in a filing cabinet without really understanding.

Stuffed the profit in my pocket :) Sometimes I dont even pay the credit card off if I have another deal in the pipeline since I am not paying interest on the money.

I'm at the point where I know I like this property enough but there could be some issues with building permits that aren't clear and some issues with (I don't know what the technical term is) possible tenant ... stuffing(?)

The reason for the threat was that I had accused his girlfriend of stuffing a piece of spray foam back in the hole I had cut it out of weeks earlier, after they had complained it was blocking the gas shut-off for the stove. why they were concerned about the shut-off cannot be explained other than looking for something to harass me with.