A contractual repayment right or guaranteed return raises a statutory capital problem; it is not simply an optional comfort feature.
Read the rights behind the sales promise
Examine side letters as well as the main agreement. The narrow enterprise-only discretionary buyback exception does not create an investor repayment entitlement, and exercise requires petition withdrawal unless sustainment and the other statutory requirements have been fulfilled. Commercial risk and immigration eligibility need separate assessment.
Request an itemized breakdown of administrative fees, legal costs, and the capital contribution from the actual subscription agreement, and confirm current government filing fees separately rather than relying solely on a promoter's cost summary. Accountants may be needed to reconcile years of filings; translators for foreign-language records; and independent commercial advisers for diligence on the project, which is an expense worth incurring rather than avoiding. Professional costs are driven largely by the source-of-funds work, which in this scenario spans a company, a donor and several years of records, and by the due diligence a sensible investor commissions on the project itself.