Cyber Dragon R.B.

If you wanted to look for a fun, budget deck, Cyber Dragon R.B. is a solid option. It's 60 € which is a nice price for a deck. The endboard you'll try to get most of the times is Heosvarog the Mechanical Dawn and Cyber Dragon Infinity together with R.B. Ga10 Cutter or R.B. Ga10 Drill linked to R.B. The Brute Blues and R.B. Funk Dock which will let you summon the R.B. main deck monster you didn't summon on your first turn once that R.B. monster blows itself up with it's effect.

Most of this is possible because both R.B. links are machine generic, meaning they require machines for their materials rather then R.B. monsters or something else. You've just gotta be careful not to go into your R.B. stuff before you finished with your Cyber Dragon stuff. You can of course try playing Polymerization to have even more value from Cyber Jormungardr, but I feel like Cyberdark Chimera and Power Bond will be enough for you. 

Another option that people often play in the Cyberdark package of the deck is Cyberdark Cannon, but from my testing I don't see the need for the card. The reason for that is that you already have Cyberdark Realm, Cyberdark Wurm and Cybernetic Horizon in your deck, which really is enough to get to your Cyberdark package and be able to go into Heosvarog the Mechanical Dawn. You also have your Cyberdark Claw to get to your Cyberdark spells, meaning that you'll rarely be in a situation where you can't get to Cyberdark Realm and Cyberdark Chimera.

Another thing that might look weird, but really isn't is the 1 Cyber Dragon. You don't need more then a single Cyber Dragon because most of your stuff is already named Cyber Dragon while on the field or in your graveyard.

You might see I don't play R.B. VALCan Rocket and the reason for that is that the card isn't a quick effect. If you're going first, card is completely useless and it's just a slot waste.

Overall, the deck is really fun and really consistent, and it can steal some games so it's not as awful as some might say. It's a nice budget option you can try out yourself.