hmmm
well u dont need to spray alot,u need a wet mf to avoid swirls so spray less
i did a detailer wipe on whole car today for first time,i used a little more spray for bonnet but then mf was already wet too though still i sprayed a little so in short i just needed few sprays to do whole car....
as a replacement u can buy cheap detailer spray like of turtle or armor all
or more cheap would be use distilled water or just water,put it in a bottle n spray water,i have done water wipe as well
one more thing,which was tried by some1 here as well,dont remember by whom...
u can add few drops of wax (natural carnuba it was i think) in water,shake it n there u go,home made detailer spray 
