title issue, how long does it take?

[Jin Kim]

I am trying to buy this single family house. Right before I was going to write an offer, my realtor found out that there's title issue. What happened is the owner (the owner actually passed away a few month ago, and her son sells this as a heir, trustee sale) bought this foreclosure house 40 years ago, and title company did not make it the loan ($150,000 the previous owner borrowed) from bank of America has been paid off. Now her son is trying to find the evidence that she paid, but he couldn't. All he could do so far is he opened a case and got a reference number from the bank. My agent suggested that we can write an offer with 10 day title contingency. I wonder if this is a good idea. how long does it take to resolve this kind of issue? I do not want to my earnest money locked in for a while. And how long does it even take to receive earnest money back from the escrow company? I like the house. I do not want another buyer to come in the picture. My husband thinks we should just wait until the title issue is all resolved. should we just move on?