to make a couple of screen doors?

I have located some Western cedar for $.95 per foot. 1x4, nominal 11/16" x
3 1/2".

I calculate that it will take 15 lineal feet per door, so figure I can add
some extra pieces and call it 50' total for a cost of $50.

I can either rout some channels, or perhaps buy channeling for the rubber
bulb to go in and hold the screen.

Hinges and clasp, another $20 tops. Total cost for 2 doors, around $100.

The cheapest I have found these doors for is $300 for two, and up from
there, some being $450 each.

I have access to a power miter saw, doweling jigs, and about everything one
would need to do a decent job. Just how hard would it be to get these flat,
square, and nice looking?

I don't think that hard.

Anyone else ever done these?

Caveats? Pointers?

Steve