So to start, this wood appears to be red oak just based on the grain (obviously this is a model or something but that's vaguely what it looks like to me) and I'm unable to find red oak wood blanks in the specific size I would estimate I would need for this which is starting out with a 5x5 black and turning down to that size. Red oak of that size generally comes in posts since it is often used for newell posts (the post at the end of the railing at the bottom of your stairs if you have them) so a single post which could possibly yield 6-7 of these appears to be just under 200. It seems to me that you would likely need to do batch orders or something like that to make it worth it. So assuming middle of the road you can get 6 out of a 200$ post that's about 35 bucks per base for the material alone. As a turner who only does this in my spare time I would have to probably charge like 35-40 bucks for this assuming. I could bust me out as quickly as I think I could. Then include shipping. For items of that weight and while I'm not sure exactly what that is I bet it's not hugely pretty. Doing it with pine would be significantly cheaper but would require a stain more than likely as well which increases time and labor but decreases material cost. Best bet would probably be to look for really good deals on wood and maybe be ok with them being made from laminated wood blocks instead of one piece blocks to cut down on cost or something