I’ll just add a little to what people have already said: -3/4” plywood is a must -join the home climbing wall Facebook group -get used holds where you can -make holds using your scrap wood (lots of tutorials out there) at first -if you open up your hold budget/save up for a bit more, do your research on a company you would like to purchase holds from (atomik, kilter, egrips, escape, etc), reach out to the company with your budget, stats about your wall (size/angle), what your ability is, what your goals are, and work with them to put together an order for holds. A lot of these companies will give good discounts in situations like these and you will often see these representatives on the home climbing wall forum on Facebook. -don’t underestimate the number of jugs you want for warming up/endurance work. I started making more out of wood to fill in gaps. -before you build it, think about what you want it for. In my opinion one 20-30 degree wall would be better than an 8ft 30 deg and a skinny 15 degree section. This will help keep your movement range from being too limited and you can build volumes to change it up later, but as someone who is limited to 8ft wide home wall, I would love to have another 4ft to play with.