Cheap and good quality rarely go together. On3 is the least expensive of the "good" kits as far as a turbo. And it has taken them some years to get there but they are now.
For superchargers... Used S trim kit if you are on a mega budget is the go-to setup. Or find a car that already has one installed.
2000 Mustang GT Steeda #0048 34k miles. 99 Cobra 4V swapped, FTBR IRS swapped, exhaust, tuned by James Gordon.
Just because I give you advice, doesn't mean I know more than you. Its just means I've done more stupid ****.