Filing fees for the immigrant petition and the later petition to remove conditions are set by the USCIS fee schedule, Form G-1055. Regional centre projects typically charge an administrative fee separate from the capital, and there are legal, translation and financial documentation costs, plus consular or adjustment charges for each family member.
List every charge, including the ones that are not fees
Build a schedule with four columns: government filing fees for each petition and for each family member's immigrant processing; the project's own administrative or subscription fee, which is usually not returned; professional fees for the immigration filing and for independent advice on the investment; and documentation costs including translations, certified copies and accountants' letters supporting the source of funds. Add the cost of the conditions-removal petition two years later, since it is part of the same process and is easy to forget when budgeting at the start. Consult the current fee schedule at the time of filing rather than relying on an earlier figure.
Note separately, and clearly, that the capital itself is an investment at risk and is not a fee: it can be lost. Hypothetical example: a cold-storage project advertises a capital amount but its investor must also pay administration charges, document costs, travel, and relocation expenses. Keep those categories separate from qualifying capital.
Build a budget that records the exact investment amount, the risk of commercial loss, non-investment fees, and reserves for the conditional period. A first review should test whether the household can meet all obligations without relying on a quick return. Confusion over which payments count toward the investment can cause both an inaccurate filing and an unsound financial decision.