Hi /vp/,

I'm new to EV training (This will be my first attempt) and I have a few questions that weren't answered during my research.

Q. What is the average amount of Pokemon you'll have to defeat in order to hit 252 EVs? (No Pokerus, No Enchancements, 1 EV per Pokemon)
Q. How can I afford so many vitamins without cheating?
Q. What is a good method of keeping track of EVs?

Information about my build:

This is Gen III. I'm EV training on Emerald. My Ralts has no Pokerus. She has a Machobrace.
For SpA I'll be fighting Spindas and for Spe I'll be fighting Zubats and Golbats.

The Pokemon I'll be training:

Ralts - Lv.5
Nature: Timid
Ability: Trace
Moveset:
1. Growl
2. Will-o-Wisp
3. Shadowball


The Goal:

Gardevoir - Lv. 100
Nature: Timid
Ability: Trace
Item: Leftovers
Moveset:
1. Calm Mind
2. Psychic
3. Will-o-Wisp
4. Thunderbolt

Finished EVs:
56HP/252SpA/200Spe

Stats at Lv. 100:
(Assuming I did my math correctly)

HP: 124
Atk: 65
Def: 65
SpA: 377
Spd: 115
Spe: 280

Apologies for my casual shit. I appreciate any help or criticism.