The cost of property to a person cannot exceed the lesser of the purchase price of the property acquired and the amount put "at risk" by the taxpayer. A taxpayer will be at risk in the amount of a limited recourse loan where the funds for repayment of the loan will be generated from the current business of the taxpayer, the lender is an arm's length person and the taxpayer has a net fair market value equity in the property.
Guidelines re calculation of "equity interest".