Trying to find the best rates I can.My logic for asking these questions is to talk to someone who can tell me what I am able to afford: get a pre-approval letter.

Intend to give tenants 6 months, more than required.(1) just informing tenants NOT renewing by a letter good enough, legally speaking?

I'd understand them, but NOT share them with your resident because, for the smart ones, it provides a nice map on how to cheat the system. https://www.hud.gov/sites/dfil...When we have a resident provide us evidence for an emotional support animal that does not meet the HUD guidelines, we simply provide them a letter that the information they provided does not meet those guidelines and encourage them to talk to their healthcare professional for more information. 

Not sure what I should do with a trailer and accessories (hitch, ties, a coupler lock, moving straps) I bought specifically for the rental business to carry supplies?

However, I do have an offer letter for a job to start in August 2022 with the salary that I will be making.

Do syndicators ever raise money and act as the operating partner themselves and received carried interest?

MLS with realtor, postcards, letter writing.

However, some insurance carriers allow you to choose how much personal property you carry on a rental and some don't.To answer your last question, insurance brokers don't always have access to every insurance carrier or insurance option. 

The other units I have not seen, my strategy is to go and put it in this initial offer letter that I can back out if I don't like the other 3 units (since I can't see them until they accept an offer).

I'm thinking of mailing a letter to all the landlords address's in the area off of data on the county records.