If you invest and get 7% interest, after taxes you may get 1-2%. If you have to get 12%+ things look a lot different. Also, investing is risky, debt anchors you and keeps you from trying new things. At that point, you're gambling your house away. That behaviour is exactly what caused the Great Depression.
Government bonds are a terrible investment strategy. You may barely hold out against inflation (the next 5 years I vey much doubt that will happen) but there's better vehicles. The stock market, for all that it's fallen, historically speaking has never had any 10 year windows that it's shrunk. It will rebound.
If you're going to get a mortgage, it should be a 15yr, fixed-rate.
If your interest is tax deductible then you are only paying taxes on the 1% that's above the interest.
Government bonds are a hedge, I would still have lot's of stocks, but the goal is to avoid needing to sell stock when the market is down. Normal bonds have higher interest rate until inflation hits or the company goes bankrupt at which point you might not get your principle back.
Owning your home ties you to that location and selling property can be a major issue. If you are living off your savings then having a single investment with 30% of you money tied down is a huge risk. If your single and there is a 20% chance you will move in the next 10 years buying a house is a bad investment but feel free to run the numbers in your area including: tax, the high cost of buying and selling, the loss of liquidity, maintenance costs, appliances etc.
Government bonds are a terrible investment strategy. You may barely hold out against inflation (the next 5 years I vey much doubt that will happen) but there's better vehicles. The stock market, for all that it's fallen, historically speaking has never had any 10 year windows that it's shrunk. It will rebound.
If you're going to get a mortgage, it should be a 15yr, fixed-rate.