The only way I know of to get a decent chunk of cash quick in this business is to sell some large life policies. Even then, you might be looking at 3 months to get a check, especially for large cases that require a bit more underwriting.
You said it, but I don't know how many people in the health and med supp biz can appreciate it. I do mostly health and med supps now, but when I got started, I wanted to make a lot of money as fast as possible, so that I could be a long hauler, and get more diversified. My second year in the biz I wrote $150K commish life insurance exclusively, but $60K of it came from 5 policies. If I had been more experienced, of course the payoff would have been much better. But I was angry and annoyed all the time. Life insurance is a bitch, when you're under pressure, but it can really pay off.
I see no sub for life insurance, for someone in need of loot.