Lumber retail is tough business. No one wants to pay retail prices.
Bless you for wanting to try!
Hope you have a second income as it takes a year or more to get store established?
Both Rockler and Woodcraft franchise stores have access to lumber supplies from corporate warehouse. Franchise prices include twice the shipping costs (mill to warehouse and warehouse to store) which get expensive when wood is milled far away, or warehouse is long distance. Local Rockler store manager claims he barely breaks even on lumber sales in store. Local Woodcraft only carries exotic species as they could not compete with lumberyard prices, despite they are 45-60 minutes away on opposite sides of town.
Shipping cost management is big part of selling lumber; due mass, weight, and transportation methods.
Here in AZ; shipping costs occupy 1/3-1/2 the cost of domestic species. Example: White oak in Midwest - $1.50 bdft by bundle. Delivered cost to AZ ~$2.75 bdft, more if partial truck load. Retail price - $4+. It varies by species too. Can get Mexican king wood delivered to AZ for less than walnut from MO/IN/OH.
Best plan is to buy local.
Find all the sawmills in your area. Call and ask for wholesale price sheets. Keep calling mills further and further away from store until you find folks that offer all the woods you want to carry. Most mills send out monthly price lists, inventory levels, and occasionally special surplus pricing on things like shorts or non FAS grades. Have to buy in full units; 300-1500 bdft each stack. Expect to have over massive amount of dollars tied up in inventory for just 20 species. Don't forget need a lot of space for fork lift to unload delivery trucks and store stacks of lumber until folks buy it.
BTW - Chasing lumber is hard work. Will spend a lot of time finding and maintaining decent sawmill supplier list.
If you need sources, look at woodweb site. They cater to commercial industry. They have a
lumber buying guide. There is also a directory on sawing/drying sources They have
an exchange too, where mills post surplus lots for sale.
Update: Best lumber prices usually come from larger mills. But some of the local small mills can have bargains when they run out of room to store wood. Be sure to check on Woodmizer 'find a sawyer' page for local sources. Regional sales offices of large mill equipment makers (Timberking, Baker, Mcdonough, Brewco, HMC, etc) will also know area mills that be looking for new customers.
Not an expert. Had similar retail lumber sales idea once.
Only passing on what I found, before I decided against the idea.
May the FOREST be with you!
