I want to give you a different slant on this…I would encourage you to think about your “client acquisition” systems. What would be involved in finding the quality clients you want to help? Examples would be: referral groups (BNI), door-to-door introductions in target area, direct mail, email drip systems, website, development of a Low Barrier Offer, development of an opt-in landing page. Over the years I have seen countless quality businesses go out of business because they had every angle covered except the one that brings them new customers. This is the number one issue for any business, in my opinion. You can’t help people who don’t know you’re there to help them.
In your business plan I would lay out each piece of your marketing plan, along with cost, expected cost per lead, conversion rate to your Low Barrier Offer, conversion rate from LBO to regular membership. With some items you might be giving it your best educated guess, in others you’ll be able to sleuth out the answers you need. Even in your guessing you’ll be further ahead than having not tried to find the answers in the first place.
Best of luck to you in your new venture!