I'm thinking this property to be a no-go for now, but it may have potential as a fix and flip if I look more into it.

I can see the undercapitalized landlord though freaking out.. they are in a no win position.. if you cant stay afloat missing 3 yo 6 months of rent your in bigger hot water than you realize regardless.

It's kind of funny how some places have a no bandit sign rule....... except for those running for office.....

To me, for funds already in retirement accounts, it is a no brainer.A couple of the benefits of holding rentals inside of retirement funds vs stocks is that you can essentially use leverage which you are not allowed to do when buying securities. 

If stabilization is not possible, the next answer would be to buy a property using a no income verification loan so you don't need your tax returns. 

as your primary you should be able to get an O/O HELOC my guess on the move out question would be dont ask dont tell, so residential HELOC's tend to be 10 year term, so I would maybe get the HELOC from a bank you dont do investing related banking with maybe an out of area bank or bigger institution. and set up a P.O. box or a different address to get correspondence from them (totally reasonable in a multifamily) this way when you move that doesnt change, so no red flag for them to call it due.

I think @Anthony Susco knows a lender who can do a no-doc loan but the interest rate is higher, which would still be a good option if you're into it for nothing and it still cash flows. 

Seems like you're off to a no messing around good start.

It's a no brainer to me. 

Taking advantage of the lower rate seems like  a no-brainer.