Need advice on materials for the bottoms of the tills in the Anarchists Tool Chest

Currently I'm in a bit of a co-inky-dink, I've just put in the saw till in my tool chest and it's time for me to start on the runners and tills. However, the country I live in is a little.. sparse in it's hardwoods. My tills ended up needing to be roughly 260mm (10 1/4") which is great because I can make ex 6" boards work (common decking size here) but the only hardwoods I can get for less than $35 L/M (9 freedom dollars a foot) are all either not going to last long or be mustard fucking yellow.

I'm fairly new to this whole cabinety joinery business, but is there a way I can use say, 3 pieces for the bottom instead of two? Would that make it too weak? I can get ex-demo hardwood for roughly a dollar a foot, but it'll be ex.100mm (4") flooring. Or do I just have to bite the bullet and accept that if I want a pale hardwood, I've got to sell a kidney?

Appreciate any input, I really can't make a decision on this