The issue is, after asking them, my neighbor/tenants will not update their mailing address to include the "1/2", so I am regularly getting their mail and placing it in their mailbox.

Other considerations things to look at include; are any utilities common (like paying for a boiler for all 4 units instead of individual furnaces), how does access/common areas work, do the tenants all have access to laundry, are there any common area utilities (light common area lights, electric or gas for laundry) that would stay in the owner name.  

The water, gas and electric are all on one bill - so it will have to be a "utilities included" rental. 

Be sure your marketing and your application include whether you have a pets/no pets policy; assistance animal policy; ALL adults must complete application and will be named on the Rental Agreement; utility responsibilities; SD requirement; when and how various funds are due (app fee, SD, initial rent, etc).

I do not know anything about Anderson Business Advisors, and have no comment or feedback on them whatsoever.I have set up multiple LLCs for various business ventures through top notch attorneys - never paid more than $900 for any of them, and that includes all state taxes and filing fees.  

@Jordan Hanks - Some companies including Evolve Vacation Rentals charge 10% for booking and marketing, with extra fees for cleaning, re-stocking, etc.

If the buyers buy the right property, the cash flow should be more than enough to cover all the costs, including that of the financing.

+Make sure the headline includes useful details (ex. free parking, dog-friendly, W/D in unit, 3 blocks to downtown) rather than generic words (ex. comfy, spacious, light-filled).

From that point, some sort of banking engine would need to be involved that was sophisticated enough to handle and understand trivial to highly complicated financial transactions.In any case, it would be fascinating to a small niche of people (myself included) so not too likely to become a commercial success.

What are the best ways to estimate the material only cost not including labor?