my main interest was in the letters he uses as messaging matters.  2nd was his method of narrowing down the list to the most likely sellers. 

You will need to show gross negligence to even think about sending him a demand letter.

She sent me this long formal letter asking me to change her annual lease to month to month because she is seeing roaches in the unit.  

I've studied Rent Control, which is just a subtype of Nixonian Price Controls, and they are always a bad idea, they always produce the opposite of the intended outcome, with run down "slums" as they are unprofitable to maintain at submarket rents, If you read the whole letter, Biden actually has a better idea later down, which is a massive govt' push at fed and state level to increase production of new housing stock at all levels, using tax breaks, incentives to developers, thus eventually lowering rents or at least slowing rise to let incomes catch up.

Sometimes lenders will want a letter of explanation from you explaining how you plan to manage the property if you're not local, but they don't all require a property manager.

It’s part of the agent's duties to make this clear in the purchase agreement or the buyer's brokerage agreement.Clarification: The broker you met with was likely emphasizing that, according to the letter of the law or the standard contract language, the buyer is technically responsible for their agent's commission.

Or, buying a Duplex and renting one side out then renting the other rooms out in the side I would live in.I have spoken with two lenders and both have given me pre-approval letters for up to 270k purchase price, with 15k down payment, conventional fixed rate loan, 30 year term.

As an example, the highest designation (MPM-Master Property Manager which I have) means that you have to have practical experience (you need 500 unit years- meaning if you managed 100 units, it would take you a minimum of 5 years), education (24 hours minimum of formal classes- or 3 days for this designation) as well as letters of recommendation from clients as well as peers (other MPMs) and you have to invest time in the property management organization be it locally, state-wide or nationally over YEARS.So the designation process, including those that are in their candidacy, takes a lot of effort and you grow through the process in many ways including wisdom (a lot actually)! 

Letters and post cards work well if they are prepared well.

Quote from @David Kanarek: In 2023, I invested in some Norada Capital Management 7 year Promissory Notes and last week less than one year after signing the last note, I receive a "form" email addressed to "Valued Investor", dated June 20th, 2024 from Marco Santarelli, who signed the letter as CEO & founder, that interest payments were being suspended until further notice without any resumption date.