Well don't get discouraged. Though books like Hooked by Nir Eyal are very web focuses, it all boils down to human psychology. You are providing something of value to someone, customer development remains the same, staff motivation remains the same, good marketing remains the same.

It would be hard to think there was no web or tech component to this business, even if it were just your CRM, email client etc. I assume as your question mentions capital expenditure you mean who to talk to, in order to secure that? In my experience it would be quite difficult (unless you are self financing to get a lot of capital invested), mainly because bank loans to a single founders are hard to come by.

So breaking it down - it appears there is demand, assuming this other company has validated your idea.

Do you have potential customers, or letters of intent from potential customers. If not it couldn't hurt to warm them up and assess their needs when building your business case.

If it's serviced base then I assume you will need to staff up? In which case it might be worth ear marking key hires. If your company will achieve 'runaway success' then actually staffing, company culture and scaling becomes quite difficult. There should be no reason to leave this up to chance, hiring mediocre people especially in small companies gets mediocre results.

Without any more detail it is probably hard to troubleshoot this any further.

Always available to discuss further if you wish.