What is an HEI?
A Home Equity Investment is a contract between you and an investment company. In exchange for a lump sum today, you agree to pay the company a share of your home's future value when you sell, refinance, or hit the contract's maturity date (typically 10 years).
The company isn't an owner of your home. They have a lien on the title — a contractual claim against your property — but their name is not on the deed. They have no rights of ownership. Your home is still entirely yours; you've just signed a contract that will require you to pay them a share of the home's value at a future date.
HEIs typically charge no interest and require no monthly payments. The "cost" of the product is the share of appreciation (and sometimes a share of the original equity) the company is entitled to when the contract is settled.