Batch has modified the regimen a bit over time, but I believe the basics are still what is listed at the bottom of the fifth page (which has the page number "2" because it's the second page of the second section -- it's the fifth page overall) of this document: http://www.vitamindwiki.com/tiki-download_wiki_attachment.php?attId=7708 It's also the chart a little way down on this page: https://clusterbusters.org/forums/topic/1308-d3-regimen/ It does not look to me like you have the right stuff at all, and you need to stop the 25,000IU of Vitamin A right away. How soon you might see results depends in part on how low you blood vitamin D is, among other things. Usually it's at least a couple of weeks, but for some people it's quicker than that. Read in either of the two files I linked you to about "loading" to ramp up your D level faster. You can send a message to Batch by clicking the envelope icon on the top right side of the page and typing Batch into the "To" line. He's a great guy who will be happy to help you.
How much O2 will cost also depends on a lot of things, including what your insurance coverage is. You either need to get a prescription from a doctor for O2 or set up a system using welding oxygen. Very different initial and ongoing costs associated with each of those. Having O2 will greatly reduce the desire you state to harm yourself. When you get started on it, get back to us and we can help you.
In the meantime, I'd urge you to read this whole file. https://clusterbusters.org/forums/topic/6213-basic-non-busting-information/ There are things you can do right now to reduce your suffering.