Would this be considered mortgage fraud since I used my job and W2 income to qualify for the loan?

As long as you have a decent job you should be able to qualify to buy a duplex. 

No you do not need a property manager to qualify for DSCR financing.

You can look into a DSCR loan, however you will need to make sure the property can qualify with market rents.

I don't intend to work the cherries (the current owner leases them), but because of them, I have been told that it qualifies as a farm and I cannot get a conventional mortgage.

I agree with you that if you are raising capital, you need to have other responsibilities in the deal, and you can't  get compensated for raising capital unless you have broker deal license.It can work if the sponsor who is running the deal is qualified, but unfortunately, people who purely raise capital can't vet a sponsor.Caution: If you're going to raise money for someone else's deal, have a conversation with a securities attorney.

I have some points on Supplement B, but not nearly enough to qualify as all my effort was on closing high-value deals that fall under A.

That should be your buyer's concern and insurable title is "good and merchantable title". :)

I listed it for $2,600 and had 20 people show up to the open house, got 3 qualified applicants and the unit was filled immediately.

When you go to B grade or higher the ROI generally drops & your field of applicants qualifying does to.