The problem is getting a beer that is all three cheap, high alcohol, and good tasting. You could get two out the three no problem. You could create a cheap, good tasting beer with low to average alcohol, or a good tasting high alcohol beer thats expensive. You could also create a cheap, high alcohol beer that's quite disgusting.
You're going to need to find a beer that has just the right balance of price, alcohol, and taste, but you're not going to find one with everything.
Maybe you should find a style that you like and then do like the macro brewerys do and replace some of the malt with cheaper fermentables to lower the cost. The more malt you replace the more the taste is going to suffer, so finding the correct balance is key.
Also hops are expensive so try to find a style that doesn't use too many.