Super budget approach for a base build of Generaiders. Was throwing together this deck for my nephew and thought this was actually pretty damn good and worth a share.
There are a few pricey cards in here, outside the short printed Generaider cards. Nothing too unreasonable. For example, Condemned Witch. That card itself sits between $5-8 and plays well with Lotpr and Trias. And can fetch your Forbidden Chalice and Lances that can be found in your Structure decks and $1 spare boxes. Maybe later, you can fetch yourself 3 copies of Forbidden Droplets.
World Legacy Monstrosity is pretty cheap steal now with recently getting a reprint(alongside a rarity bump).
Kuji-Kiri Curse, another great card. Might run you a $2. Currently $0.50 to $1.
Ash Blossom(~$11) and Called by the Grave(~$6) are bit pricey as single sells. But you can, and don't know why wouldn't have already done it, get these from the Duel Devastator box. I recommend snagging these from a local store and not online. Save yourself $10-$15. Or... side in some other options.
Phantom Fortress. $1 card.
True King of soon to be, and most likely won't be banned, is a less than $2 option boss.
Nine-Lives Cat is a $0.10 option, that plays well with your Hela and helps loop GY resources from your side and opponents.
Finally, the unfavorable, Purple Trishula. A good $2 optional card, that looks pretty. Helps keep the board tidy with an effect that can be annoying to your opponent.
The overall pricing for this deck sits at about $160. Which sounds like a lot but alot of the pricing comes from Ash Blossom, Called by the Grave, 2 short printed Generaider cards and some of the other non-Generaider card's.
If you're tracking these cards sensibly. You can easily snag these card for barely a headache or pinch to your wallet.