DND5e Character Sheet Question (how to get all options for charactermancer)

Want to make it easier for my players, so that all the classes/subclasses are available when they build a character.. What would I need to purchase on roll20 for this to be possible? Thank you.  Again, this is for 5e. 

Essential : Player's Handbook Highly Recommended : Xanathar's Guide to Everything (mostly for additional classes), Volo's Guide to Monsters (mostly for additional races) Limited Value : Eberron (Artificer class, some setting-specific races) Ravnica (Some setting-specific races and class options) Mordenkainen's Tome of Foes (Some race options, but mostly lore) Wildemount (Some setting-specific races and class options) Not Released Yet, But of Limited Value Sword Coast Adventurer's Guide (A few races and classes, some of which are reprinted elsewhere) Princes of the Apocalypse (this exists, and has a few options, but they have not yet been made available to the Charactermancer) Mythic Odysseys of Theros   (Likely will have some setting-specific races and class options) Only buy if you are a completist : Compendiums from Kobold Press marked as having new races and/or class options (Margreave Player's guide?) Aquisitions, Inc. (Some setting-specific races and class options) Many later WotC modules contain the occasional background or option that are usually specific to that module Summary If you stick with the first three, you'll have the best bang for your buck. Eberron is quite popular, so look it over and decide.

But to have everything in the charactermancer, like every class, subclass, race and background, I need to purchase all of those then? 

Note that "Sword Coast Adventurer's Guide" haven't been released yet on Roll20, and that "Mythic Odysseys of Theros" (MtG setting) will be released in a few weeks. Elemental' Evil Player Handbook options, (part of Princes of the apocalypse) doesn't have compendium parts, but they are included as handouts in the module(adding them to compendium is in Roll20 backlog).

Derp. I had SCAG confused with the other prodigal, Out of the Abyss. I have edited my post and will update it as more info comes in.

Kristopher V. said: But to have everything in the charactermancer, like every class, subclass, race and background, I need to purchase all of those then?  To have absolutely everything? Yeah. But we are getting into paying $49.95 for a handful of backgrounds territory, then.

Thank you guys for the responses. Making some purchases today. :)