Happy Valley schools are very good schools, (being that I am raising my two childern here in Happy Valley, makes me a little bias (-;
Being that you have an RV, I would suggest South if Sunnyside. The new construction is all throughout Happy Valley but mainly on the North side of Sunnyside, small lots and not room for your RV. Whereas the south side has 1990's and older homes for resale that would have larger lots.
Shoot me an email and I can send you a few that I have in mind.
Definitely talk with a lender, I am almost positive you would need to have some sort of income coming in now to be considered towards repayment of the loan, but I am not a lender. I direct all of my financial questions to Steven Seim at Director's Mortgage. He will take the time to educate you while answering you questions.
Hope this helps!