• “401(k) Plans No Longer Make Much Sense for Savers”：https://www.yahoo.com/news/401-k-plans-no-longer-123003444.html Roth401k應該除外（用現在的rate）或做in plan convert to Roth。
• 529: https://www.savingforcollege.com/intro-to-529s/does-a-529-plan-affect-financial-aid 比較靠譜的功能介紹

• Treasury direct auction results: https://www.treasurydirect.gov/auctions/upcoming/

• The Federal Housing Finance Agency (FHFA) https://www.fhfa.gov/
• 
   
• https://ctcredit.net/
• lawyer finder https://www.martindale.com/

•  
• Savings calculator: https://www.nerdwallet.com/article/banking/savings-calculator
• Mortgage calculator: https://www.mortgagecalculator.org/ 
• Mortgage rate: https://www.zillow.com/mortgage-rates/quotes/
• Refinance Mortgage calculator: https://www.zillow.com/mortgage-calculator/refinance-calculator/
• Retirement：https://retirementplans.vanguard.com/VGApp/pe/pubeducation/calculators/RetirementIncomeCalc.jsf
• quick SS estimate https://www.ssa.gov/OACT/quickcalc/
• 2020 & 2021 ：https://www.nerdwallet.com/article/taxes/capital-gains-tax-rates
• title co https://www.firstam.com/

• Blogs: https://scottburns.com/the-n-factor-and-retirement-planning/
• https://dqydj.com/net-worth-by-age-calculator-united-states/
• Tax, cost segregation   https://www.vestmap.com/the-huge-value-of-algorithm-based-cost-segregation-studies-for-smaller-rental-properties/

to be continued