There isn't much in the way of rules here. Indeed, the community doesn't really know if the plan has to be specific to a particular project. The regulations simply say the following: [To satisfy the safe harbor] "all of the following three requirements are satisfied: (A) Designated in writing. These [working capital assets] are designated in writing for the acquisition, construction, and/or substantial improvement of tangible property in a qualified opportunity zone, as defined in section 1400Z–1(a). (B) Reasonable written schedule. There is a written schedule consistent with the ordinary start-up of a trade or business for the expenditure of the working capital assets. Under the schedule, the working capital assets must be spent within 31 months of the receipt by the business of the assets. (C) Property consumption consistent. The working capital assets are actually used in a manner that is substantially consistent with paragraph (d)(5)(iv)(A) and (B) of this section." Consistent with the foregoing, I'd pick out a property and do a rough out of what I plan to do to it, how I will pay for it, when I need the money, and how much. Then, I'd do a spreadsheet with several columns. The first would be the title of the particular activity (negotiate acquisition documents, seek bank financing, acquire the property, get permits, pour the foundation, install the plumbing, etc.). The second might have identifying information, like the architects, banks, builders, etc., that I plan to contact (or who they are if they are already arranged). Next would be the start and end date for the particular activity, and finally we'd have the amount to be spent on the activity. If it was going to be over an extended period, I'd probably have several lines with estimates of the amounts to be spent as they come along. If I don't have all the money at the start of the transaction, I'd include lines for when and how I will get additional funds. Finally, I'd review it with the people who are going to do the particular activities to establish that it is reasonable (remember, reasonableness is one of the requirements!), and that the funds are sufficient, or can be obtained, and that they can be spent in accordance with the timetable. Now, I want you to note that this is simply my recommendation. Plainly, the more you have, the less likely that the IRS will challenge that you have a written plan. Still, I could imagine a skimpier plan if that's what you have. And I could imagine a plan that identifies a few properties, or even a kind of property, and says that you will buy one or more of them, although I have a strong preference for identifying a particular property and project. I'll also note that there are some more conservative advisors who think that you have to have all of the money in advance, although I have discussed this with IRS and Treasury officials, and I think that reasonably expecting to get the money should work.