So i dunno how much experience you have but there is zero “guarantee” with any magick it isn’t like buying powertools from the hardware store. Magick is not a “quick fix” to anything.
Magick depending on the type creates opportunities for you based on what is done. If it is money magic it an opportunity to make money will come um but you have to take action on it. Same with any kind of magick for love,lust health,job hunting, seeking a home, ect.
With a skillful magician who knows what their doing life changing opportunities can fall in your lap but it would still be up to you to take all the necessary actions to make the changes and to make them permanent.