Duplex have different zoning that may permit additional units.

I agree and additionally I'd recommend going down to the store and actually feeling them.

In addition to that, building your network is key.

In addition, due to the 2 of 5 year rule there often is no need.  2) you cannot 1031 a property that has not been put into service to be an investment property 3) you cannot 1031 a flip.  

Additionally, I have $100,000 in cash in the bank, and my monthly expenses for my home and family are around $3,500.My wife earns between $100,000 and $120,000 from her W2 job, while I've recently lost my job but found a new one that pays $65,000 a year.

This could cost around $500 to $1,500 per unit, depending on the size and complexity of the project.Certifications: There may be additional costs for certifications (such as HERS ratings) or third-party testing to verify the energy efficiency of each unit.For a 90-unit project, you could be looking at costs in the range of:$45,000 to $135,000 for energy modeling and certification (depending on the cost per unit).For a 112-unit project, the costs would likely be:$56,000 to $168,000 for similar services.Tax Credit Calculation:If you meet the energy standards, you can claim up to $2,000 per unit.

Once you have cash in hand, you can unlock the unit for 24 hours and let him move his stuff out.I would also consider charging an additional deposit of $500 or something, just to prevent him from leaving all the trash or stealing your refrigerator.

Avoid C-Corps, as they incur double taxation.Use LLCs for rentals and consider an S-Corp election for flips if income justifies the additional complexity.This post does not create a CPA-Client relationship.

In addition to cheaper prices through Minoan, they set up a site for your property with affiliate links in it. 

In addition, you want a separate bank account for the rental property to separate it from your personal accounts.