I think a HELOC is the best option 95% of the time, especially with rates on the higher end. 

Other than that, you should respect their time and expect to compensate them if you expect a weekly check-in or more.3) Would recommend exploring options with a HVAC company BEFORE you move.

. $25k special allowance is not optional.

If this will be an equity partner, an LLC may be the better option.

I would like to know what are the options that I can use to be able to keep my property.

You will have the option of using someone within your state or perhaps out of state. 

Realistically speaking, you'd need to double that price range ($600-800K) to see low-end duplex options on the market.

Alameda could be a nice option, if work is close to the ferry...

putting a post on your local state hosting facebook group might be a good option as well..

While a cash out refinance is a very good option in this situation, you could also look to see if the lender you are currently working with would give a commercial line of credit as well.