I printed this post and will keep you in mind for appliance referrals.

If you have the funds, it's as easy as hitting the print button on your printer.

As in, how do I know that the seller is not simply making it up on Excel and printing it?

I am buying the list from listsource and printing my cards.

I've read, re-read, printed, highlighted, and re-read Brandon Hall's Safe Harbor blog post hoping to make it simple.

I use my own homemade software for all of my accounts receivables.A couple of examples - when Quicken "prints" a check, it does not transmit the check number. 

It is very similar to stainless steel but better to maintain (no finger print residue, easy toclean and always looks nice)

If you do pursue more insurance I suggest you read the fine print--don't buy just because it is the cheapest and make sure your agent has experience with investors who are not only your size currently, but also familiarity with investors who have scaled to higher heights because if you plan to grow, you need a proper foundation now or else growth will be costly and time-consuming later. as @Juan Carlos Quiroz Zolezzi says "all insurance policies are created equal" and neither are insurance agents...Feel free to reach out with any other questions.

I used Word to print cursive addresses on standard envelopes.  

@Josh Carter anything is possible in real estate investing but as with all real estate investing you need to read the small/fine print.