1. Cumulative debt interest payments.
2. Cumulative debt repayments.
3. The costs for maintaining the property in a good state, estimated by the formula:
$$ {1 - e^{-( t/T )^2}} $$
where t is time in years and T is the maintenance time constant.
4. The invested assets value, estimated by the formula:
$$ {S ((1+g)^t - 1)/g} $$
where S, g, and t are the yearly saving, the yearly growth rate, and the time in years, respectively.
5. The amount to be paid at the end of debt contract.