Saving is income not spent, but put aside. Your cash in hand would more appropriately be unspent income. Savings would be what you move into a separate account, one that you don't use for daily/monthly expenses, but leave untouchedfor events such as travel, large purchases, or your future (e.g., school or retirement).
Your building and land are investments, not savings, and while they have value, they are not liquid, meaning they can't easily be converted into cash to cover travel related expenses. If you have rents paid to you from these, then it would be rental income.
If a question is asked on the visa application form which doesn't apply to you, then you can leave it blank, if permitted, or put in 'no' or n/a (not applicable).