First time indoor grower

So I have designed a grow tent out of 3/4" pvc
2 1/2' × 2 1/2' 5 feet tall

Is this big enough for 2 or 3 plants?
What size light would I need?
And i know i need an exhaust fan going out, but, if its supposed to be sealed off to no light gets in, where is my air supposed to come in at?
Can i use viagrow reflective film from home depot for the walls?

And any other indoor growing tips would be greatly greatly appreciated

Thanks everyone!

2.5x2.5ft is 6.25ft

With HPS you would want a 400w because 250 would be too little in flower. 250w mh bulb would be good for veg.

or

A 315cmh would be ideal for the space.

or

If you use a quality LED , an efficient one using something like Samsung 301b diodes or similar then your looking at
180-200w in flower or 100w in veg.

5ft in height is restrictive, when you add your carbon filter and your light to plant distance and pots it leaves you a bit short on space for plant matter. It is doable but you will have to keep plants short. an extra foot in height would make thing a lot easier.

2.5x2.5ft is one plant to me but you can fit two or four in there and flower earlier.
Its going to take some practice but you will get used to it.

White panda film will be fine for the walls. I don't know what viagrow is.

For intake you can have flaps like they do in tents or if you don't want light escaping use a few dark room vents or simply a couple of pieces of foil ducting curled around so light reflects back on itself and not in or out.