If that is true net, it is not to bad by todays standards.
But you could currently get 5.75% (gross) on a savings account.
1) It basically depends if you think property prices are still set to rise, even by smaller amounts is not to bad because the main risk is a forced sale. 2) While yields on BTL look derisory, the big risk is low interest rates. In this case you would get derisory returns on savings, while property would likely steam on ahead. 3) people like bricks and mortar, tangible things. Don't know why, they just do. Maybe they fear a run on the banks or something.