I'm aware of the pitfalls of SFR vs Multi in regards to being susceptible to vacancies and I'm sure I will kick myself when I hear the answer, but if a person buys a batch of SFR, say over 8 at once, is there a reason they can't be treated/managed as a multi unit portfolio?

You can try varying your batches of mail.

I'm in the process of creating my own and batching content for the website and blog. 

I had a feeling the first one would be the hardest, now im nearing 1k numbers and hopefully this next batch ill get something going.

One we nearly closed on but turned out the landlord wasn't completely honest...Planning another direct mail campaign soon, after the first batch of calls I am more comfortable fielding calls and knowing what to ask.good luck!

I touched basis with the company doing my mailings to get a status report of where we stood regarding the mail outs, and at this point the first batch of yellow letters and postcards were mailed, and the other yellow letter batch went out that past Friday.

My wife and I sent our our second batch of letters 2 weeks ago and these have had a much better response than the first batch. 

I sent 1,000 letters to Orlando a few months ago and will be closing my 4th wholesale deal from that batch this week.

In the successive batches there was really a lot of competition and was amazed to see even non-institutional investors bidding the prices down to as low as 3% even where they were the only bidders.

I have been fix and flipping properties from the courthouse steps for the last 5 years and now that things are slowing down, I'm going to send out my first batch of letters to absentee owners.