Some cost that may vary based on location will be your environmental impact study, your list of cost from the Architect may see a lower cost for the schematics on a smaller project, with similar footprints for all four units, versus varying unit size, and scope requirements (less work, lower cost for A&E), the feasibility study, proforma, 3-D renderings, and other associated cost are going to depend on where this project is going to be built. 

You may want to contact the local manufactured housing association in the area.

Currently, I am not going to college, and this is where it gets trickyShould I go to college and get a degree, if notShould I get certifications at Baruch College that are for the Real Estate industry Or should I focus on meeting successful real estate investors, bankers, attorneys, brokers, and paying for mentorships, courses, books?

I became a licensed sales associate while I was pregnant with our first baby.

I know the basics regarding framing, plumbing/electrical rough ins, hvac and roofing and all the associated permits that go with those as I've done all of that before but they've mostly been single family/condos with this being my first multifamily rehab.

You may want to consider an LLC for liability purposes.A road association can be a big selling point if competing properties don't have one - especially if the roads are dirt. 

The best rates come mainly from the company they work for and their associated programs/products. 

If you're a member of the National Association of Realtors, you should have a Zip form login that's State specific for your needs. 

Of course, there are costs associated with moving, just as there are costs/trade-offs associated with financing with less than 20% down.That bit being said, did your lender talk about using a FHA loan? 

Loans fall into specific categories, and must meet requirements associated with that category.