Welcome to the site and ask away. Simple cinder block arches are a great way to get started but have a short life span because the cement is not a high heat material. They can be insulated against the heat but are cumbersome. But don't let that stop you from going that route just remember you will outgrow it so don't get so far into it that you can't make the next step.

investing in a better barrel stove will make moving and selling it later an option. A lot depends on the pan set up so most people tend not to invest in a nice set of SS tig welded pans on a block arch.