Depends on your trash fees and particular area. 

Another thing that helps maximize the strategy is the amount of cash inflows a person has each month or the amount of inflows because on a revolving line the interest is calculated daily or on an average daily balance like what  depending on the LOC (line of credit).on the All in One or AIO loan from CMG the interest is calculated daily and swept or added to your balance at 12AM each day so all your paychecks, rental checks from rentals, or stock dividends, distributions from your business, or etc can be used to lower your balance by 12AM each day and lower your total interest costs.Most HELOC's or lines of credit calculate interest on the average daily balance which is like all balances within the last 30 days divided by 30 which is not as efficient as the AIO's daily sweep but close.The third method of interest calculation is the 30 year fixed which amortizes or calc's interest every 30 days or month so extra principal paid into this loan after the 1st of the month doesnt lower the incremental interest on the reduced balance till next month.

It really depends on the multi family you cash out to buy .

Sometimes you can get info online and sometimes you have to order and pay for lien search depending on municipality or county.

@Sam Josh as usual, it depends on where and what type of property you have.

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