A point I'd like to add. I beat this "use quality wood" drum all the time.
A few years ago I built a 22 foot sailboat for a customer- all up, it cost him about 22 grand, sails, etc included.
I priced the plywood materials using Fir Marine, and again using BS 1088 quality stuff.
The cost difference for the entire boat, would have been $700 which is a ridiculously small amount to try to save in a $20 K plus overall expenditure.
And the bad taste from using cheap stuff lingers forever.
Use the BEST materials you can get- Your TIME is worth so much more than the wood is, and you can Never regain that time.