Here is another take on the budgeted deck builds for Guilds of Ravnica Standard. The deck archetype is Blue Red Izzet Spells, which has creatures that benefit from your casted Instant and Sorcery spells. Crackling Drake (and is probably the most expensive here, along with Niv-Mizzet) is the main player here, given the situation of an open attack in the air when combined with Maximize Velocity. The rest of the creatures’ roles are to chip on the life total of opponents while we set up our hand with cantrip spells.

See the decklist below.

Creatures
4 Crackling Drake
3 Goblin Electromancer
2 Enigma Drake
2 Piston-Fist Cyclops
2 Wee Dragonauts
1 Niv-Mizzet, Parun

Spells
1 Beacon Bolt
4 Chart a Course
2 Crash Through
2 Lightning Strike
3 Maximize Velocity
4 Opt
4 Radical Idea
4 Shock
1 Tormenting Voice
1 Warlord’s Fury

Lands
4 Izzet Guildgate
8 Island
8 Mountain

I have recently found a subreddit page that tackles MtG budget deck archetypes for Standard and Modern, and even for the Commander format. I have recalled that I was publishing a budget segment for Standard, but had to discontinue those as the single-card prices continue to rise.

That said, this page will definitely be a big help to those who are new to the game and would want to build a deck that is within their ‘wallet capacity’.

As I know, MTG Goldfish has been the go-to website as they have a segment for the budget builds, including the individual card prices and versions of the builds. This subreddit page, though, can provide other websites for reference. Check out the video below of one example deck build.

Another budget deck suggestion can be found here on this thread. They suggest that Blue Red Prowess burn is the go-to build, and it has the potential, given that a similar deck archetype has made it to the top 8 of Pro Tour Kaladesh.

The complete thread, entitled Super_Budget_MTG can be found here. Just check each of the individual posts for the details and decklists provided by the users.