Unless you're receiving insurance from a government agency (Medicare, VA, Medicaid), your insurance should cover it. As Jon' and 'Denny say, welding is a very viable alternative. You gotta have O2!!
You ask about prescription meds, so starting there (nothing new that I know of) . . . Verapamil is commonly prescribed as a preventive. Short-acting (not timed-release) is better. Prescriptions can go up to 960 mg/day or sometimes more before they are effective; most doctors don't prescribe that. You should be monitored as you start it and as you ramp up. I'm always puzzled about Maxalt. Is it just in pill form? Pills usually don't work well, but you say the Maxalt is effective. Nasal spray and injections generally work more reliably and faster. Many people are convinced that triptans extend cycles and make attacks worse, so getting O2 and using energy shots and other abortive strategies is pretty important. Among other "home-remedy" abortives are sucking ice water through a straw so it's hitting the roof of your mouth (to cause "brain freeze"); deeply breathing very cold air from an air conditioner or freezer; and standing in a bathtub of very hot water.
Here's a link to info about the D3: http://www.vitamindwiki.com/tiki-download_wiki_attachment.php?attId=7708 I'm gonna say that 90% of people who do the regimen correctly get some relief from it, and I'd say maybe two-thirds, or even more, get exceptional relief. It is not likely to help you right away, but the sooner you start it, the sooner it will help. There's also a thread here about vitamin B1 being very helpful: https://clusterbusters.org/forums/topic/5417-b1-oral-high-dose-thiamine/