For me as well as the seller.First, you have to define Sub to financing.Do you mean the reckless kind where you overpay for a property, take over the financing and borrow from others to cover closing costs and holding costs when you have no money, no credit, no income, no reserves and can't tell a warranty deed from a deed of trust and you close on the kitchen counteror do you meanbuying below market value, already having a nice income, having reserves, using escrow and title, already understanding the due on sale clause, have done a lot of creative purchases and know when to use and when not to use creative finance and how to recover if something goes amiss?

You can be told one thing & the PM can continue to cover it up without your knowledge.

- FYI: it's only illegal to try to rent it out, the property owner can usually legally live in a nonconforming basement unit.If you do all this you may still negatively cashflow each month, so make sure your income can cover and/or your cash reserves.If you do this successfully, you will learn more in 1-2 years than you would reading here on BP for 5+ years:)Good luck:)

Sam spent the first 6 months doing demos covered in old dust, working 60 plus hours a week to learn, and cold-called in his free time. 

Can try to reposition to Class B, but neighborhood may impede these efforts.Vacancy Est: Historically 10%, but 15-20% should be used to also cover tenant nonpayment, eviction costs & damages.Tenant Pool: majority will have FICO scores of 560-620 (approaching 22% probability of default), many blemishes, but should have no evictions in last 2 years.

It doesn't cover any loss of income due to your rental being repaired.

I would focus on saving enough money that if I had a deal go bad, then that money I saved was there to cover it. 

Find a great real estate attorney to help you with:1) Putting a lien on the property, with your aunt's consent, to cover any work you do.- Ask the attorney if your aunt & dad need to authorize lien, or just aunt.2) Understanding your options to force payoff of the lien.- Ask attorney how you can enforce collecting on the lien when you need to.3) Getting full control of the property, while allowing your aunt to keep her ownership.- Have attorney draw up a contract to do this.Suggest you offer your dad some cash, now or in the near future, to motivate him to transfer his ownership to you.It may not work out, but you will learn a lot either way!

Can try to reposition to Class B, but neighborhood may impede these efforts.Vacancy Est: Historically 10%, but 15-20% should be used to also cover tenant nonpayment, eviction costs & damages.Tenant Pool: majority will have FICO scores of 560-620 (approaching 22% probability of default), many blemishes, but should have no evictions in last 2 years.

Assuming the ARV you mentioned is accurate, at 75% LTV you'd be able to pull enough equity to cover your existing payoff, refi costs and walk away with a good chunk of cash in your pocket.