Call and check out their prices and times available. Check second hand and resale shops. Also consider renting as the boys do their tuxes. Or sew, if you have that skill. Don't try anything radical.
Many department stores do free makeovers.
Which is how I did it. Have Mom file and polish. There is no need for a salon manicure. I am a dedicated nail biter, and opted for a pair of lace gloves. We have two daughters and they go to every prom, homecoming and even courtwarming.