I'm planning on building a base for a queen-sized mattress, and need to decide on a material for the base's sub-structure frame. I am planning on covering/cladding this frame with a hardwood like White or French Oak. I know that mixing hardwoods and softwoods together is ill-advised due to wood movement especially in softwood, but building the entire sub-structure frame out of even a cheap hardwood will push this project way out of budget.
There is a company in my area that sells reclaimed Baltic Pine (I live in South Africa). I've worked with it before and it seems to be about the same density as our regular local pine (may be a bit harder if I do a thumbnail-press-test). This option would be great as it would bring me in way under budget.
My second option would be to use cheap 15mm Pine Plywood (I think these have an Okoume core) and laminate them together to create the needed structural components. However, I've worked out that for this project, I would therefore need to purchase at least 4 sheets which will cost me 6x the amount of purchasing the required Baltic Pine.
I haven't given any thought yet to what method I will be using to attach the hardwood to the frame, but I'll probably end up settling on using regular cold wood glue and countersunk screws.
So my question is, is there a way I can make this work using the Baltic Pine?
The picture below is just a depiction of what I have in mind, using the frame posts as an example.