WA State Off Market Lot

I am looking into approaching my neighbor / neighbors POA about purchasing a lot they own. The owner is older and moved into a home years ago. According to public records, her child is her POA. The lot has several liens on it- utilities, DSHS economic recovery and now 2 city liens for clearing the property of debris. And potentially more that I am not able to locate in the public records system. The home is a complete tear down and is not safe to live in with broken windows, partly missing roof, etc. There is an individual who has been living in the residence for several years and just continues to trash it. How would you approach the owners child about purchasing the property? Is there a way for me to obtain the total amount of liens without having any nexus to the property? Anyone have experience with DSHS economic recovery liens? Any insight is appreciated. Thank you all!