In my opinion I do not see any bank that will be willing to finance this project. Even thou your parents may be willing to take out the loan, the bank will want to know what the money will be used for. Since your parents are not on title and this money would be used for another property this will be a problem. My question for you is why do you think your credit score is not good enough? Have you tried to secure the financing already? If by chance the problem is your Loan To Value ratio or Debt To Income ratio is out of whack then I would wait to install the pool. Wait for the market to rebound some more which will create some equity for you and or pay down some more of your debt. Either way this will improve your credit scores. At that point you will be in a much better position to qualify yourself for the financing and be more comfortable in the process. If I may answer any further questions please let me know. Good luck!