The seller is willing to carry a note for the 5% and accept monthly payments until it’s paid off.

Hey, there was a guy I just used ... allowed me to pull 50% out of a paid off property ... no income verification and credit qualification ... though they did pull my credit. 

Don't be afraid to ask them about if/how claims are paid out!

I found a fourplex I want to house hack....

Purchase with an FHA, fix it up over time and go from there.

However, I own a business that I opened this year..... no W-2s.

How can I get financing for this? Suggestions?

Rehab was all paid with cash out-of-pocket.

This issue came up because I actually may have a pre-buyer for the house (although I'm not banking on it). 

I paid the old landlord a substantial $1700 deposit prior to moving in last summer and am concerned about the refund of that deposit and any other small little things I haven't thought of that come along with a new landlord mid lease.

You mentioned you have only owned the property for three years so I assume you haven't paid down much of the principal but because you did put work into it, it could be worth getting an appraisal of the new value.

I paid cash.How did you add value to the deal?

After mortgage paid I generate 350 a month from that..