If one or more units are vacant, the remaining units often don’t provide enough cash flow to cover expenses, making it harder to meet operating costs.Maintenance costs: A fourplex comes with four times the appliances, plumbing, HVAC systems, and other components to maintain, leading to significantly higher repair and maintenance expenses than single-family homes.If you want to see the detailed calculation, read this BP blog - More Units Doesn’t Mean More Money—Why a Single-Family Home Can Beat a Fourplex.Resale value: Multi-family properties have a limited buyer pool—mainly investors—who base their offers on CAP rates.

Sewer line backup, ordinance & law, and replacement cost coverage are coverages I include. 

There are kinds of guru's who will help you buy section 8 properties in a turnkey package including the rehab the property will need to get it rented.

S8 standard voucher amounts INCLUDE all utilities.

This should include potential rental income, expenses (including property taxes, insurance, maintenance, and potential vacancy), and your expected return on investment. 

I watched every single video and did every single exercise they suggested including writing in extreme detail about my perfect day once I’d “made it”, making an audio recording of it and then listening to it every day.

While the offer sounds tempting, I want to ensure I capitalize on these contracts fairly and effectively.Here are my main questions:Should I entertain the idea of terminating my current contracts, or is it better to stick to my original wholesale plan?

Sounds like a good plan, should have plenty of options available.I would be cognizant of any group you talk with on two areas, the location of the property including any potential concerns of it being 'rural', as well as the minimum purchase price and/or minimum loan amounts.

That’s because it can include renting furniture and decor to more fully transform a space.How Do I Know Which One To Pick?

No exceptions, including for tax reasons.