There are hundreds of all-grain recipes that are cheap, simple and amazing. Cheap doesn't have to mean mediocre beer. Try a Saison, a shade over $20 for 20L. Great tasting beer. I'm doing another one soon and you can be drinking it in 7 days if kegging.
81% Pilsner malt, or really any base malt you have like Ale etc. Doesn't matter, it's such a broad style.
15% wheat malt
4% carapils (if you don't have this, leave it out)
A bittering hop such as Norther Brewer, Magnum or whatever 18 IBU 40 mins
A noble aroma hop at flameout at 0.5g/L
mash 65 degrees for 60 mins
Boil 70 mins, no chill
Ferment 25 degrees with Belle Saison dry yeast.
OG 1.044
FG 1.003
Alc 5.3%
This is a cracker.