HELOC= short term useFixed (first or second) = long term use like a down payment.  

Or take a break. 

I have recently started writing down addresses of run down or abandoned properties that I would like to purchase, but I only have the owner's name.

If you have a 2 year work history, and go get a W2 job tomorrow, we could use your base pay right away (as long as it is "guaranteed hours" or considered "full time". 

We forbid TV mounts, shelves, or items that require bolts, anchors, screws, or large nails.

It can take a year or more to complete an ADU.

You could also get a line of credit for about $150k (you should be able to borrow 75% of the value.)The reason I suggest this is…1) you save $40-$60k in selling costs. 2) you have a lower blended interest rate (2/3rds at 3.25% and 1/3rd at 7 or 8% instead of the whole $500k at 7 or 8%) saving you another $1k/mo in interest. 3) you only pay interest on that $150k when you actually use it, not from day 1  Unless you hate this property, or want to buy something you can’t afford without selling, that would be my plan.

Or take the proceeds and do the next project.

There are few places as iconic to visit or invest as the Pacific Coast in the US and the coastal stretch of Oregon is no exception.

Could it attract squatters, or is it the right move for responsible property management?