Arthur Voskanyan  A cash out refi is generally a first lien 30 year fixed rate VS a HELOC is 10 years interest only second lien with a variable rateRates depend on the loan amount, your credit, if you occupy the property, the loan balance, ect @Chris Mason should be able to provide you specifics

Just depends on what you are looking for.

it must depend on your market.

Depending on where you live, even signing a purchase contract to then wholesale the property could obligate your spouse to the contract, and also give him rights to 1/2 of the gain from the wholesale activity.Although you indicated you are not seeking legal advice, my advice would be to get some before you embark on this activity. 

Depending on the disclosures the buyer made for the sale of your home there might not be anything wrong .Perhaps the contract had an assignable clause or he advertised will be sold after closing.The agent might appear to not  be ethical but is simply selling a home for a higher price that is under contract  The fact that he did not cancel your contract might allow you to keep the emd or demand the buyer to perform  

How much you charge depends on her tax rate. 

will also depend partly on which market, western Washington for the example has notoriously bad soils which would require far more scrutiny than somewhere like Colorado for example.

If you have all tenants on M2M you can quickly adjust by raising their rents when rates go up depending on your state regulations. 

Hi @Jason TuroA lot of these questions are going to depend on your goals/ vision. 

It all depends if you want a deal or just pay retail.